$4\:\left(x-m\right)+2m\left(x-m\right)$
$x+\sqrt{4x}-3=0$
$\frac{2^{x+1}\cdot\:\:\:\:\:5^{x+1}-2^x\cdot\:\:\:\:\:5^x}{2^3\cdot\:\:5^x+5^x}$
$36z^4-42z^2$
$3-2x>-25-4x$
$18x^2+48xy+32y^2$
$73-126-83$
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