$\left(x^{m+1}-a^{m-1}+a^{m-2}\right)\left(-2a\right)$
$25-196x^4$
$\frac{x^3+5x^2-4x-20}{x+4}$
$-x+2\ge-1$
$\left(5m^2n-3mn+mn^3\right)\left(-2m\right)$
$y'\:=\:\frac{x^{10}}{y}$
$8\:+4\:x\:1^2$
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