$\left(-3\right)^3-4\left(2\right)$
$\frac{dy}{dx}=1+y+2xy+2x$
$9+2n+1-9n$
$\left(x+y+1\right)^3-\left(x-y-3\right)^3-2\left(y+2\right)^3$
$x+3y+2z=2$
$\lim_{x\to2}7$
$6\cdot777$
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