$-1+\:4\:+\:-1\:+\:9$
$\int e^y\:cos\:y\:dy$
$x-9<31$
$x\frac{dy}{dx}=x^2\sin\left(x\right)-y$
$\left(1+x\right)^4\cdot\left(1-x\right)^4$
$x^2+82x-9$
$4+3+1-2-0-5$
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