$587+722$
$|-14+17|$
$\frac{6-\sqrt{x}}{x-\sqrt{x}}=\frac{1}{2}$
$\left(7m\:-3y\right)\left(7m\:+3y\right)$
$x^2-6x+12$
$dy+\left(y-x-5\right)dx=0$
$4+4y$
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