$\frac{3\cdot10^4}{8\cdot10}$

$\int\left(1+\frac{1}{u}\right)^3\left(\frac{1}{u}\right)du$

$\frac{du}{dt}=\left(1+u\right)\left(8+t\right)$

$\int\frac{\left(ln\left(x\right)\right)^{44}}{x}dx$

$\frac{dy}{dx}=\left(6x^3-3x^2+30x-15\right)$

$\frac{-24x+7}{5}\le3$

$\frac{-x}{x}$