$\frac{8m^2+18n^2}{4m^2+9n^4}$
$\left(x+7y\right)\left(x-7y\right)$
$\int\left(y+\sqrt{y}\right)\left(1-y\right)dy$
$5+4k+9$
$\frac{\tan\left(x\right)}{1-\cos\left(w\right)}=\csc\left(x\right)\left(1-\sec\left(x\right)\right)$
$x^2+3x-648$
$64m^6-1$
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