$3x^2+x+1;\:x=1$
$\left(6n^2+3m\right)^2$
$222\:+\:\:\left(\:-\:111\:\right)\:\:-\:\:\left(\:111\:\right)\:+\:333$
$\int2x\cdot\left(2+x\right)^{-\frac{1}{2}}$
$-12-4b=4-2b$
$18x^2-39x+20$
$\sqrt{x+7}+x=5$
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