$t^2+2t-43=0$
$\left(2x^2+3x-2\right)\left(x^2+2x\right)$
$8b^2+7b-1$
$w-2w$
$\log_{25}\left(0.04\right)$
$\left(y^2+yx\right)dx=-x^2dx$
$\frac{2xy+y^2}{2xy+x^2}$
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