$x^2+6x+9=10$
$\frac{d}{dx}x^{-4}\cos x$
$\int_{x^2}^{8-x^2}dx$
$3^{2x}+3^x-2=0$
$2x\:+\:3\:+\:4y\:+\:5\:+\:4x\:+\:y\:$
$\lim_{x\to0}\left(\frac{x^2+\:2x}{\sqrt{x}}\right)$
$\sqrt{x}2\:+\:13\:=\:2x\:-\:5$
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