$\lim_{x\to\pi}\left(\left(x+\pi\right)cscx\right)$

$x^2y^2\left(x-y\right)\left(x^2+xy+y^2\right)$

$v\left(t\right)=\sqrt{\frac{gm}{c}}\tanh\left(\sqrt{\frac{gc}{m}t}\right)$

$196x^2y^4-225x^{12}$

$\left(2x^5-y\right)^5$

$13b\left(-2a+5b-10c-8\right)$

$\int\left(9x^2-7x\right)e^{4x}dx$