$7\left(a-2b+2\right)+7b$
$\int\left(\sqrt{3x-9}\right)dx$
$\left(3a\right)^6-256$
$34-65+89+88-765$
$\left(x^4+4x^2-\frac{1}{2}\right)\cdot\left(x^3+\frac{1}{2}x\right)$
$\lim_{x\to2}\sqrt{3x^2+4}$
$\int\left(\frac{-4}{\sqrt{1-x^2}}\right)dx$
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