$m^2+2mn+n\:^2-1$
$x+\frac{1}{y}=1$
$\frac{3}{a^{-9}}$
$\int_0^2\frac{3}{x^4}dx$
$\sec\left(x\right)=\frac{9}{2}$
$\frac{d}{dx}\left(x^{8\cos\left(x\right)}\right)$
$\frac{3x^4+2x+3}{x^2-3x+2}$
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