$\left|\left(3\right)^2-4\right|$

$\frac{7x^3-14x^2+21x-28}{x-1}$

$\left(\sqrt[4]{5a^3}\right)^3$

$\frac{5^{\frac{1}{2}}\cdot\:6^{\frac{1}{2}}}{12x^{\frac{1}{2}}}=\frac{\sqrt{5}\sqrt{6}\sqrt{x}}{12}$

$x+4<3$

$-\sec\left(x\right)^2+\csc\left(x\right)^2=\sec\left(x\right)^2.\csc\left(x\right)^2$

$\left(\left[\frac{2}{3}\:\right]x^{6-y}-1y^{3-x}\right)^3$