$\sqrt{108x^2}$
$\lim_{x\to0}\left(\frac{x^2}{2-\sqrt{4+x^2}}\right)$
$\frac{d}{dx}y^7-4y^5+3y=2x^3+3x-1$
$\sqrt { 2 x + 5 } - 4 = 3$
$\left(x+3\right)\left(x-4\right)\ge\left(x+4\right)$
$x^2-20x=0$
$-\left(4s+8.5\right)$
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