$-2.9\left(-2.3v+7\right)$

$x-14=-28$

$\frac{dy}{dx}\left(\frac{\left(\sqrt{x}\right)}{2}-\frac{2}{\sqrt{x}}\right)$

$\frac{\left(5\right)\left(21\right)^6}{\left(3\right)^4\left(7\right)^5}$

$3x^4-5x^3+x^2-7x.-3x^4+x^3-2x+1$

$\frac{du}{dt}=e^{2u+5t},\:u\left(0\right)=14$

$\int\left(y^{-3}e^{-4}\right)dy$