$\left(2x+1\right)^2-\left(\sqrt{x}\right)$
$20a^2+a-1$
$x^2-13x$
$\int\left(\frac{3x^2}{\sqrt{16x^2-4}}\right)dx$
$-17+7\left(-7\right)-\left(-5\right)+\left(-10\right)-\left(-2\right)+4-57$
$9x^2+108x$
$3x-4\left(4x-8\right)=3\left(-8x-4\right)$
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