$-10\::\:1$
$12x^2-48=0$
$cos\left(x^2-2x\right)xd$
$a^3b^3+a^2b^4$
$7a\:+\:7b\:-\:7c\:-\:7$
$\frac{2}{5-x}+\frac{3}{x+7}=1$
$\left[3\left(x+y\right)+5\right]\left[3\left(x+y\right)-5\right]$
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