Evaluate ddx(∫0x2cos(t) dt)\frac{d}{dx} \left( \int_0^{x^2} \cos(t) \, dt \right)dxd(∫0x2cos(t)dt).
cos(x2)\cos(x^2)cos(x2)
2xcos(x2)2x \cos(x^2)2xcos(x2)
cos(x4)\cos(x^4)cos(x4)
2xcos(x)2x \cos(x)2xcos(x)