$4-\left(-2\right)\cdot4$
$x\left(y-z\right)-8;\:x=-2;\:y=3;\:z=-5$
$\left(2x^5+4-\frac{2}{x^5}\right)\left(4x^4-5\right)$
$\left(\frac{1}{3}\right)a\left(x-3y\right)$
$\frac{2}{\left(1-x\right)^3}$
$2125+2125$
$\sqrt{x^2-3x+2}+\frac{1}{\sqrt{3+2x-x^2}}$
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