$\left(x^{\frac{1}{2}}\:.\:x^{-\frac{1}{3}}\right)^2$

$\left(9u^4\right)\left(-8u^2\right)$

$\frac{x}{10}+13=20$

$4x^2-9<0$

$\int\left(\frac{\left(x-1\right)}{\left(2x+5\right)\left(x-8\right)}\right)dx$

$\log\left(x^2-1\right)-\log\left(3x-8\right)=1$

$\frac{10}{3}b+1-\frac{12}{7}$