$8-4\cdot4$
$e^{x+1}\left(x-2\right)$
$15\:9-15-9$
$2\left(3h\right)$
$65-\left(-23\right)-17$
$\frac{x^3+3x^2+3x+1}{x}$
$6y^2z+z^2\:si\:y=-2\:z=6$
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