$16m^4-25m^2n^2+9^4$
$\sqrt[3]{1-x^3}+x$
$2x^2+15x+6$
$\left(2a+1\right)\left(2a+2\right)$
$\lim_{x\to1}\left(\frac{1-x}{x^3-2x^2-x+2}\right)$
$72.15-55.20$
$\frac{32y^5+243}{2y+3}$
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