$\lim_{x\to0}\left(\frac{8x^2+3x}{7x^3+5x+6}\right)$
$\frac{1-\cos\left(2x\right)\:}{\tan^2\left(x\right)}=1+\cos\left(2x\right)$
$\frac{f+4}{32}=\frac{1}{f}$
$-60b+2ba-18a-6$
$\frac{1}{3}y^3dx+\left(1+x^2\right)dy=0$
$\frac{x^2+x-6}{2x^2-13x-7}$
$\left(2y+7x\right)\left(2y+7x\right)$
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