$\frac{1}{5}\cdot\frac{1}{2}\cdot\frac{5}{6}\cdot24$

$3\cdot\:\left(x-5\right)^2-12\ge\:0$

$x+4=6$

$\lim_{x\to2}\left(\frac{x^2-2x}{x-2}\right)$

$\left(10a-11b\right)^3$

$\left(18-8x\right)\cdot3=150$

$\frac{\sin\left(3u\right)\cos\left(u\right)-\sin\left(u\right)\cos\left(3u\right)}{\sin\left(u\right)\cos\left(u\right)}$