$3x^2+4x+2x^2-3x$
$\int\frac{2}{49-\left(x+7\right)^2}dx$
$2\cdot8-10$
$2\sin\:3x-1=0$
$x^2+2x+1<0$
$\int\left(3x^2-7x\right)e^{2x}dx$
$x\left(x-1\right)+\left(x-1\right)$
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