$\int\left(5x^4+5\right)^{\frac{2}{3}}\left(20x^3\right)dx$

$\frac{\sin70.\cos40-\sin40.\cos70}{\cos80.\cos27+\sin80.\sin27}$

$\frac{dy}{dx}+ysin\left(x\right)=9sin\left(x\right)$

$\int x\left(x-3\right)dx$

$\frac{6^{-y}}{2a+b}$

$\left(-0.3x+.04\right)\left(0.3x-1.4\right)$

$-\cos\left(2\right)\left(x\right)\left(1-\sec\left(x\right)^2\right)$