$2000\left(1+0.20^{12}\right)$

$\left(6x^5+x^2-7x^4-x+12\right)-\left(x-3\right)$

$y=cos^e\left(4\right)$

$\lim_{x\to0}\left(\ln\left(\frac{3}{x}\right)\right)$

$\frac{\left(1+\cos\:\left(x\right)\right)^2+1-\cos\:^2\left(x\right)}{\left(1+\cos\:\left(x\right)\right)\sin\:\left(x\right)}$

$15x^2+3x+2=0$

$3x-\frac{1}{2}>6$