$\frac{y^3}{27}-125z^6$
$3\cdot2^4-5\cdot2^2-1$
$\lim_{x\to3}\left(\frac{3-x}{x}\right)$
$\frac{dy}{dx}=\frac{y+1}{\sqrt{x}+\sqrt{x}\cdot\sqrt{y}}$
$\:\left(a+b+3\right)\left(a+b+4\right)$
$\left(a+b+c\right)^2=a^2+b^2+c^2+2\left(ab+ac+cb\right)$
$x^2-100+0$
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