$\left(x-1\right)^2\cdot\left(x+2\right)^2$
$x^2-12x+6$
$13x\:-\:5x\:+\:17x\:+\:4x\:-\:20x$
$\int\left(\frac{\sin\left(x\right)}{2+\cos\left(x\right)}\right)dx$
$7b=-7+8b$
$\int\frac{4}{x^2+16}dx$
$\int\left(x^2e^a\right)dx$
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