$-3x\:-10x\:-4y\:-2y$
$e^y\left(1-x^2\right)dy-2x\left(1+e^y\right)dx=0$
$-10x^2+33x-20$
$2\sin\:^2a-1=\sin\:^4a-\cos\:^4a$
$c-2=\frac{18}{c}+7$
$\frac{x-2}{3}<1$
$\int\frac{e^{-3z}}{3}dz$
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