$\frac{3x}{5}+7=2x$
$12\left(x^3+\:x\right)$
$-2x\le-20$
$\lim_{x\to2}\left(\frac{2x-3}{x-1}\right)$
$\int_1^{\infty}\left(2x^{-\frac{4}{3}}\right)dx$
$\frac{x^3-3x^2+x+3}{x-5}$
$\int\left(x^3+4\right)^4\left(x^2\right)\:dx$
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