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

$cot\left(x\right)-csc\left(x\right)=-\frac{sin\left(x\right)}{1+cos\left(x\right)}$

$\int\left(k\right)^2e^kdk$

$2436\cdot35$

$\int3^{10x+3}dx$

$\left(1\cdot secx\right)+\left(secx\cdot tanx\right)\left(x\right)$

$\int\frac{5}{1+e^{2x-1}}dx$