$\int-30x^2\cos\left(5x^3+2\right)dx$

$m^2-n^2-m-n$

$\int\frac{\left(x^3\right)}{\left(2-x^2\right)^{\left(\frac{1}{2}\right)}}dx$

$\frac{d^2}{dx^2}\left(4x^2+7\right)^4$

$\left(2x^3+4y^2-6x\right)\cdot\left(2x^3-6y^2-2\right)$

$\frac{5}{8}x-\frac{1}{5}x=17$