$-7<3x-5$
$\lim_{x\to0}\left(\frac{x}{\sqrt{a+x}\:-\:\sqrt{a-x}}\right)$
$z^2+z^2+3z-z^2$
$\left(y-1\right)\left(x-1\right)$
$-7+\left[-3+\left(-5+1\right)-\left(3-1\right)\right]$
$\frac{y}{x}dx+\frac{x}{y}dy=0$
$y'=s\cdot y+s\cdot exp\left(t\right)$
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