$\left(x+3\right)\left(x-3\right)=\left(x+3\right)^2$
$\frac{2x^2+4x}{2x}$
$sin^2\left(x\right)=7-2cos^2\left(x\right)$
$\int4x^4e^{-2x}\:dx$
$2\ln\left(x\right)+1=\ln\left(2x\right)$
$6x^2-33x+36$
$32-\left(-17\right)-32$
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