$2\cos\left(2x-30\right)=\sqrt{2}$

$6x^2+y^2=9$

$809.787375+1.357123375$

$\int con^nxdx$

$\frac{tan\left(x\right)+cot\left(x\right)}{sin\left(x\right)+cot\left(x\right)\cdot cos\left(x\right)}$

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

$\lim\:_{x\to\:2}\:\frac{\left(x^3+x^2-4x-4\right)}{x^2+x-6}$