$\frac{-72}{24}$
$\frac{x^2-5x+4}{x+1}$
$46-\left(-30\right)-8$
$x-y-z-x-y+z$
$-x^2-4x+8\:<\:0$
$\cos^2x+3\sin^2x-3$
$\left(-10\right)-\left(+2\right)-\left(-5\right)-\left(+6\right)-\left(-8\right)$
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