$\left(5ab+6\right)^2$

$\int\frac{x^4}{\left(x-1\right)\left(x^2+1\right)}dx$

$\int_{-3}^0\left(\left(x^2+2x+11\right)-\left(-4x+2\right)\right)dx$

$\sqrt[2]{3x^2+6}-3$

$\frac{d^2}{dx^2}\left(x^2e^{3x}\right)$

$\frac{dy}{dx}=cos\left(x\right)sin\left(y\right)$

$dy+5y=\left(10\right)dx$