$5x-2y=4$
$2a^3+b^2-5c\:-a^3-7b^2+3c$
$9x^2+y^2-6xy$
$\lim_{x\to\infty}\left(\frac{\sqrt{x^2-1}}{1-x}\right)$
$4v+8+2+3v$
$\left(\frac{1}{4}x-\frac{5}{3}\right)^2$
$\frac{dr}{d\theta\:\:}+r\cdot\:\:\:tan\theta\:\:=sec\theta\:$
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