$3-\left(-6+15\right)+\left(3+4\right)+\left(9-2\right)$

$\int\left(3x-5\right)\cos\left(2x\right)dx$

$\int\frac{x^3}{\sqrt{x^2+25}}dx$

$\int5x\cdot\left(x^2-2\right)^4dx$

$\frac{d^2}{dx^2}\left(x^{n-1}\log\left(x\right)\right)$

$2xy^2-14xy$

$\frac{2}{3}m+\frac{4}{2}m^2-\frac{8}{3}m^3$