HornerDerivative(b,c,t,l,n,z)

exists ff_u_hd_research ff_v_hd_research ff_d_hd_research ff_e_hd_research. ((((((exists fs_h_ph_hd_research_body_value_start. fs_h_ph_hd_research_body_value_start + S (0) = S ((S (0)) * ff_v_hd_research)) /\ exists fs_q_ph_hd_research_body_value_start. ff_u_hd_research = fs_q_ph_hd_research_body_value_start * S ((S (0)) * ff_v_hd_research) + (0))) /\ ((((exists fs_h_ph_hd_research_body_value_terminal. fs_h_ph_hd_research_body_value_terminal + S (n) = S ((S (l)) * ff_v_hd_research)) /\ exists fs_q_ph_hd_research_body_value_terminal. ff_u_hd_research = fs_q_ph_hd_research_body_value_terminal * S ((S (l)) * ff_v_hd_research) + (n))) /\ forall ff_i_ph_hd_research_body_value_steps. (exists ph_bound_hd_research_body_value_steps. ph_bound_hd_research_body_value_steps + S ff_i_ph_hd_research_body_value_steps = l) -> exists ff_coefficient_ph_hd_research_body_value_steps ff_previous_ph_hd_research_body_value_steps ff_current_ph_hd_research_body_value_steps. ((((exists fs_h_ph_hd_research_body_value_steps_coefficient. fs_h_ph_hd_research_body_value_steps_coefficient + S (ff_coefficient_ph_hd_research_body_value_steps) = S ((S (ff_i_ph_hd_research_body_value_steps)) * c)) /\ exists fs_q_ph_hd_research_body_value_steps_coefficient. b = fs_q_ph_hd_research_body_value_steps_coefficient * S ((S (ff_i_ph_hd_research_body_value_steps)) * c) + (ff_coefficient_ph_hd_research_body_value_steps))) /\ ((((exists fs_h_ph_hd_research_body_value_steps_before. fs_h_ph_hd_research_body_value_steps_before + S (ff_previous_ph_hd_research_body_value_steps) = S ((S (ff_i_ph_hd_research_body_value_steps)) * ff_v_hd_research)) /\ exists fs_q_ph_hd_research_body_value_steps_before. ff_u_hd_research = fs_q_ph_hd_research_body_value_steps_before * S ((S (ff_i_ph_hd_research_body_value_steps)) * ff_v_hd_research) + (ff_previous_ph_hd_research_body_value_steps))) /\ ((((exists fs_h_ph_hd_research_body_value_steps_after. fs_h_ph_hd_research_body_value_steps_after + S (ff_current_ph_hd_research_body_value_steps) = S ((S (S ff_i_ph_hd_research_body_value_steps)) * ff_v_hd_research)) /\ exists fs_q_ph_hd_research_body_value_steps_after. ff_u_hd_research = fs_q_ph_hd_research_body_value_steps_after * S ((S (S ff_i_ph_hd_research_body_value_steps)) * ff_v_hd_research) + (ff_current_ph_hd_research_body_value_steps))) /\ ff_current_ph_hd_research_body_value_steps = ff_previous_ph_hd_research_body_value_steps * t + ff_coefficient_ph_hd_research_body_value_steps)))))) /\ (((((exists fs_h_ph_hd_research_body_derivative_start. fs_h_ph_hd_research_body_derivative_start + S (0) = S ((S (0)) * ff_e_hd_research)) /\ exists fs_q_ph_hd_research_body_derivative_start. ff_d_hd_research = fs_q_ph_hd_research_body_derivative_start * S ((S (0)) * ff_e_hd_research) + (0))) /\ ((((exists fs_h_ph_hd_research_body_derivative_terminal. fs_h_ph_hd_research_body_derivative_terminal + S (z) = S ((S (l)) * ff_e_hd_research)) /\ exists fs_q_ph_hd_research_body_derivative_terminal. ff_d_hd_research = fs_q_ph_hd_research_body_derivative_terminal * S ((S (l)) * ff_e_hd_research) + (z))) /\ forall ff_i_ph_hd_research_body_derivative_steps. (exists ph_bound_hd_research_body_derivative_steps. ph_bound_hd_research_body_derivative_steps + S ff_i_ph_hd_research_body_derivative_steps = l) -> exists ff_coefficient_ph_hd_research_body_derivative_steps ff_previous_ph_hd_research_body_derivative_steps ff_current_ph_hd_research_body_derivative_steps. ((((exists fs_h_ph_hd_research_body_derivative_steps_coefficient. fs_h_ph_hd_research_body_derivative_steps_coefficient + S (ff_coefficient_ph_hd_research_body_derivative_steps) = S ((S (ff_i_ph_hd_research_body_derivative_steps)) * ff_v_hd_research)) /\ exists fs_q_ph_hd_research_body_derivative_steps_coefficient. ff_u_hd_research = fs_q_ph_hd_research_body_derivative_steps_coefficient * S ((S (ff_i_ph_hd_research_body_derivative_steps)) * ff_v_hd_research) + (ff_coefficient_ph_hd_research_body_derivative_steps))) /\ ((((exists fs_h_ph_hd_research_body_derivative_steps_before. fs_h_ph_hd_research_body_derivative_steps_before + S (ff_previous_ph_hd_research_body_derivative_steps) = S ((S (ff_i_ph_hd_research_body_derivative_steps)) * ff_e_hd_research)) /\ exists fs_q_ph_hd_research_body_derivative_steps_before. ff_d_hd_research = fs_q_ph_hd_research_body_derivative_steps_before * S ((S (ff_i_ph_hd_research_body_derivative_steps)) * ff_e_hd_research) + (ff_previous_ph_hd_research_body_derivative_steps))) /\ ((((exists fs_h_ph_hd_research_body_derivative_steps_after. fs_h_ph_hd_research_body_derivative_steps_after + S (ff_current_ph_hd_research_body_derivative_steps) = S ((S (S ff_i_ph_hd_research_body_derivative_steps)) * ff_e_hd_research)) /\ exists fs_q_ph_hd_research_body_derivative_steps_after. ff_d_hd_research = fs_q_ph_hd_research_body_derivative_steps_after * S ((S (S ff_i_ph_hd_research_body_derivative_steps)) * ff_e_hd_research) + (ff_current_ph_hd_research_body_derivative_steps))) /\ ff_current_ph_hd_research_body_derivative_steps = ff_previous_ph_hd_research_body_derivative_steps * t + ff_coefficient_ph_hd_research_body_derivative_steps)))))))

The unchanged native kernel never receives this surface symbol. Binder-safe expansion produces only its existing first-order syntax.