$\left(\frac{90\cdot y^a\cdot x^b\cdot z^3}{10\cdot x^b\cdot z^3}\right)^b$

$\frac{3^2\cdot5^4}{0.9^3}$

$n^2-9n+18$

$\left(7x^3zw-2xz^3w\right)^2$

$-220+-18$

$\int\frac{1}{\left(x-2\right)^{\left(\frac{3}{2}\right)}}dx$

$\log\left(\sqrt[3]{\frac{\left(x+7\right)^4}{x^5}}\right)$