$\int\left(\frac{2}{9x+2}\right)dx$
$2\sin\cot\sec^2=2\sec$
$\left(-x-2y\right)\left(-x+2y\right)$
$-\left(-11\right)^2$
$y^2=c\left(x+1\right)$
$\left(3x^2-3x\right)+\left(2x-2\right)$
$2u\frac{4}{3}v\frac{2}{3}\cdot2v-\frac{3}{2}\cdot4v^2$
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