$\left(3x-3\right)\left(3x-2\right)$
$-5-3-4+7+2+3-6-4+6$
$\int\:\frac{e^x}{\left(e^{2x}+1\right)\left(e^x-1\right)}dx$
$\left(x^3+x+2\right)^2$
$24a^2-54b^2$
$9\:-\:9\:x\:2$
$-5\left(-9\right)+3+\left(-5\right)+8+3+7+\left(-5\right)$
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