$\left(n^2-1\right)\left(n^2+2m\right)$
$49x^270x+10y^2$
$\left(\cos^2\left(x\right)-1\right)\left(\tan^2\left(x\right)+1\right)=\sec^2\left(x\right)$
$17x^5-51x^4+34x$
$\int\frac{\left(x+3\right)}{x}dx$
$\frac{x^2-9y^2}{3x+9y}$
$y+6=\sqrt{2y^2+72}$
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