Simplifying
$\left(7x^{12}+13\right)^2$
$\left(x+35\right)^3$
$\frac{1}{\sqrt{x^2+2}}$
$\int x\cdot tan^2\left(2x\right)dx$
$\lim_{x\to1}\left(\frac{\sqrt{x\:}}{x-1}\:-1\right)$
$m^3+6m^2+9m$
$5x^2-x-9-2x^2+10x-15$
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