$\:y-1+20y^2$
$\frac{\left(x+1\right)^2}{3x-4}$
$x^2+90x+225$
$16a^2-b^2$
$\frac{5}{3x+5}=\frac{3}{3x+5}+1$
$312h\:kh$
$\int\:\sqrt{x+\frac{1}{2}}dx$
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