$18abx-27ab^2y+9a^2bz-3ab$

$\left(x^{\frac{3}{4}}y^{\frac{2}{3}}z^{\frac{1}{2}}\right)^{12}$

$64m^6+96m^4+48m^2.n^2+8n^3$

$\left(3n^{-4}\right)\left(2n^3\right)$

$\frac{y}{12}+2=-16$

$\cot\left(a-b\right)=\frac{cot\left(a\right)cot\left(b\right)+1}{cot\left(b\right)-cot\left(a\right)}$

$213xy+34x$