$\left(-7x^3-1+2x^{-2}\right)\left(2x^2-3\right)$
$x-43\le17$
$\int_1^{\infty}\left(\frac{x}{\sqrt{16x^4-1}}\right)dx$
$\left(4x^2-7y^2\right)^2$
$\left(2x^2-4x+5\right)^2$
$-33m^4+44m^3-11m^2$
$\left(a+b\right)\left(a-2b\right)$
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