$-4\cdot17$
$\left(-7\right)\cdot\left(+11\right)$
$2z\left(z-y\right)+\left(z-y\right)^2$
$-x+y=2x-y+1$
$-4\cdot\left(8-5\right)$
$5x^4-3x^2+2x^2+6x$
$\frac{d}{dx}2x^2+y^5=8$
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