$x\cdot sinx\:-\frac{\sqrt{3}}{2}x=0$
$\sqrt{x-1}=2$
$\ln x=7$
$\frac{-1+cosx}{sinx}=-cscx-cotx$
$\frac{\left(x+2y\right)^2+\left(x-2y\right)^2}{x^2+4y^2}$
$n2-5n+10n-10$
$\left(\frac{3}{4\:}a-\frac{2}{5}a\right)^2$
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