$16-104m^2+169m^4$
$x^2-13x+0$
$\int\sqrt{1296-x^2}dx$
$\left(8x^2+2\right)^2\left(6+5x\right)^2$
$\left(x+2a\right)\left(x-3a\right)$
$\:\:\frac{2x^2+4x+5\:}{x-2x+2+5}\:$
$50^4$
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