$3-\left(-1\right)\cdot\left|-3+4-5\right|$
$2+2n-2$
$\lim_{x\to0}\left(tan2t\right)^{2t}$
$\frac{243}{9}$
$3x^{2}-12=\left(x-4\right)^{2}+8x$
$7\left(x+3m+4\right)$
$5t^2+10t+5$
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