$n^2-4n+4$
$\int3x^4\sqrt{x-2}dx$
$-\log\left(x\right)=1.22$
$\left(x^5:\:x^3\right)^2$
$\left(b^2+2\right)\left(b^2-2\right)$
$36x^2y-81y^3$
$\frac{b+6}{4b^2}+\frac{3}{2b^2}=\frac{b+4}{2b^2}$
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