$\lim_{x\to\frac{\pi}{2}}\left(\frac{1+\cos\left(6x\right)+cot\left(x\right)}{1-sin\left(x\right)-cot\left(x\right)}\right)$

$\frac{\left(1+12\cdot5-\frac{22}{2}\right)}{\left(6\cdot3+\frac{14}{2}\right)}-2\cdot\left(19+5-17\right)-1$

$2x^2+y^2+1=0$

$\left(cos\:x\:-\:sin\:x\right)^2$

$\int\left(\frac{x^3}{4-x^4}\right)dx$

$\int4ay^{3\:}dy$

$10^3\cdot10^{15}$