$r^2-20r+2$
$8x^2+1>5$
$\int\frac{x^{3\:}}{\left(1-2x^4\right)^5}dx$
$-6x^2+4x+2x+7x^2-7x^2$
$16x^8-1$
$\left(2x-5y+6\right).\left(3x\right)$
$\int\left(3-2t+t^{2}\right)dt$
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