$\left(a^2x^3-2y\right)^3$
$\left(x^{-2}+1\right)^3$
$\left(3x+9\right)\left(3x-9\right)=9x^2-81$
$x^2-5x+1<\:0$
$\int\ln\left(x^3+1\right)dx$
$\frac{x^2+7x+7}{3x+3}$
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