$\int2\cdot o\cdot x^3\cdot e^{-ox^2}dx$

$\frac{y^2}{2}=-\frac{x^2}{2}$

$\frac{1}{\sin\left(x\right)}\left(\frac{1}{\cos\left(x\right)}\frac{\cos\left(x\right)}{1}\right)$

$\frac{\left(x-2\right)^n}{\left(2^n\left(n+1\right)\right)}$

$-10\::\:-4$

$2x\sqrt{3x}$

$k^2+14k+48$