$-\left(20+50-90-7\right)$
$y-4=10$
$y=\left(x^3+4x\right)^5$
$4p-7q+5p-12p-11q+8p-11q+12r+p+5r$
$\left(\frac{2}{3}x+\frac{1}{2}y-4\right)+\left(\frac{1}{4}x-\frac{5}{6}y-\frac{1}{2}0\right)$
$\left(c^2+d\right)\left(c^2-d\right)$
$\frac{m^3m^2-8m-12}{m+b}$
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