$\left(\frac{2}{3}x^{13}+\frac{9}{2\:}ymn\right)^2$

$cos\left(2\pi-\pi x\right)$

$\int x\left(x^2\sqrt[5]{5+x}\right)dx$

$\int6x\left(x^2-3\right)^4dx$

$y'+9\cdot y=5\cdot e^{\left(5\cdot x\right)}$

$\frac{d}{dx}\:x^3-3x$

$\tan\left(x\right)+\frac{1}{\tan\left(x\right)}=0$