$x-\frac{5}{8-2x}$
$\lim_{x\to-2}\sqrt{16-4x}$
$\int\:\frac{6x^2-2x-1}{x^3+x^2-2x}dx$
$-4\cdot7\left(8-7\right)$
$4x^3y^2+2x^2y^3=\left(2x^2y^2\right)\left(2x+y\right)$
$y^2+11y-80$
$\int_2^{\infty}\left(\frac{1}{\sqrt{x^2-x-1}}\right)dx$
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