$\int\frac{1}{\left(x^{2}+6x+13\right)^{2}}dx$

$\int\left(\frac{-7}{\left(x\left(2x-1\right)\right)}\right)dx$

$\left(z-3\right)\left(z-2\right)$

$3\left(3+4x\right)\left(3-4x\right)$

$\int\left(18sec^29xtan9x\right)dx$

$-37+-7+-11+-18$

$\left(\frac{1}{2}a^4+\frac{2}{3}b^3\right)^3$