Help:Derivative

[buffgilville]

Compute the derivative of
d/dx (limit of from -3 to 5x-1) integrand 2[square root of (10 + 5cos(t))]dt

[Galileo]

\frac{d}{dx}\int \limits_{-3}^{5x-1}2\sqrt{10+5\cos(t)}dt

The fundamental theorem of calculus looks appropriate here.