$\sqrt{\frac{c^2-x^2}{c^2+x^2}}$
$x\frac{dy}{dx}=y+xy$
$\int-1dt$
$x\:-y\:+\:2x\:\:-\:3y\:-\:x\:-\:2x\:-\:3y\:$
$\left(3s-4\right)\left(2s+1\right)$
$-8\left(b+3\right)$
$\int\sin\left(4x+2\right)dx$
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