$x^2-2x+-3=3$
$\frac{\left(8x-4\right)}{x^2+2x}$
$\lim_{x\to-\infty}\left(1-\frac{4}{x}\right)^{x-1}$
$\left(-5-1\right)-\left(7-\left(6-3\right)-8\right)$
$x+y+2\sqrt{xy}$
$63a^4b-37a^3b^2+27a^2b^3$
$\left(3y\right)+\left(5z\right)^2$
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