$94-13\log\left(x+1\right)$
$3\left(-2\left(8-3^2\right)+5\right)^2$
$\frac{dy}{dx}=\frac{1}{xy+x+y-1}$
$\log\left(x+20\right)=1$
$7\sin^2x+16\sin x+9=0$
$2x^2-x-3x-x^2+2x^2-3x$
$\int\:\frac{u+1}{1+u^2}du$
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