$\sqrt[3]{729\sqrt[3]{a^3}}$

$20z^4-10z^4+14z^4$

$\frac{\left(-108\right)}{\left(-36\right)}$

$\int\left(8^x+12\:\sec^2\left(x\right)-5\csc^2\left(x\right)\right)dx$

$\left(+2\right)+\left(-3\right)-\left(-6\right)$

$\frac{b+a}{n}+\frac{m+b}{d}-5^a$

$\left[\left(-9\right)+\left(-6\right)\right]\left[3-\left(2-4\right)\right]$