$a^2-a-132$
$\left(-5x^2+4x^4\right)^2$
$8x^2y^3z-2xy^3=-4xz$
$x-3y-9-4x-5x+x-3y-9-4x-5$
$\left(4x+8y\right)^3$
$\frac{4b^{3}\cdot3a^{4}b^{2}}{3a^{-2}b^{4}}$
$-\:\left(-9\:+\:5\right)\:-\:\left(3\:-\:7\right)\:+\:\left(-3\:+5\right)$
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