$\cos x+\sin x\tan x=7$
$-50+125-75-175$
$\left(5^2\:+7x+8\right)+\left(3x+9\right)$
$3y^5\cdot4y^7$
$-24:\left(-3\right)\cdot\left(-8\right)$
$320+-210+-165+412+382$
$16\sqrt{x}-10\sqrt{x}$
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