$\frac{-14y^{2}+33+71y}{-3-7y}$
$\frac{1}{\tan^2x}=\sec^2x$
$7x-2xy+9xy-2x+5$
$\left(r^{-2}\right)^{-1}$
$\int_{\frac{2}{\pi}}^{3\pi}\left(tan\left(x\right)+sec\left(x\right)^2\right)dx$
$0=\frac{x+3}{7x-28}-\frac{6}{x-4}-\frac{2}{7}$
$-3m^2-5m+4=2$
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