$120x^4y^2\:+\:180x^3y^3\:-\:240x^2y^4$
$-9x\:-\:x\:+\:3\:+\:5$
$\frac{x^2}{5}+3;\:x=5$
$\frac{-\cos\left(2\right)}{\sin\left(x\right)}=2\sin\left(x\right)-\csc\left(x\right)$
$\left(4y\:+\:9x\right)\:\left(4y\:-\:9x\right)$
$\int\left(\frac{-x+3}{x^2+x-2}\right)dx$
$-15=11-2x$
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