$3xyz\left(-5x^2y^3z^4\right)\left(-10xy^2z^3\right)$

$\csec^{2}2x\int dx$

$\int_{\frac{1}{30}}^{\frac{1}{20}}\left(25\right)^{-1}e^{-\frac{x}{25}}dx$

$xe^x-x$

$\frac{dy}{dx}=\left(x^6+x^4+x^2\right)$

$\int_0^{2\pi}\left(-\sin^2\left(x\right)\right)dx$

$-\arcsin\:\left(\frac{1}{4}x\right)+\frac{x}{\left(16-x^2\right)^{\frac{1}{2}}}$