$15mn^5+6m^4n^4-12m^2n^2x$
$\int_{-1}^1\left(\frac{1}{x^2}\right)dx$
$y-7=-2x^2-15x$
$\left(5x\:-\:y\right)^2$
$\frac{x^9}{27}-\frac{y^{12}}{64}$
$100\cos\left(x\right)=\left(\frac{36}{\cos\left(x\right)}\right)$
$\frac{x^2^n-y^2^n}{x^n+y^n}$
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