$x^2-2x\ge0$

$y=\sqrt[3]{x}-\frac{3}{5}\sqrt[5]{x^2}-3\sqrt[4]{x}$

$y^2\:-\:121\:$

$\lim_{x\to\infty}\frac{3x^2-8x}{3\left(x^3-4x^2\right)^{\frac{2}{3}}}-1$

$\sin\left(2x\right)-6\cos\left(x\right)=0$

$\left(\frac{b^2-1}{b^2}\right)^3$

$\frac{10}{\left(x+2\right)}\:\frac{7}{\left(x+2\right)}$