time derivative of integral of polynomial p(u) from u_low to u_high, assuming only u_high as time-dependent (Leibnitz rule)
function integralValue_der input Real p[:] "Polynomial coefficients"; input Real u_high "High integrand value"; input Real u_low = 0 "Low integrand value, default 0"; input Real du_high "High integrand value"; input Real du_low = 0 "Low integrand value, default 0"; output Real dintegral = 0.0 "Integral of polynomial p from u_low to u_high"; end integralValue_der;