$\int\frac{x+7}{x-9}dx$
$\frac{1-x}{-2\:}<2x$
$\int\frac{1}{x^5+x^4}dx$
$\left(x-7\right)\left(7x+5\right)$
$216-y^6$
$32 + x = - 83$
$\int\frac{1}{x^2-\frac{25}{9}}dx$
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