$20\left(-1.5x+0.75\right)$
$\frac{d}{dx}9xlnx-5x$
$\left|5^2-4^3\right|$
$\int\frac{\left(\left(49\right)\right)\cos\left(x\right)}{\left(\left(-20\right)\left(x\right)\right)}dx$
$600\cdot33-600\cdot3$
$a^3-2a^2-a=0$
$\left(-3x^{4}-4x^{3}-1\right)+\left(-x^{4}+4x^{3}+2x^{2}+x+1\right)$
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