$\frac{3}{4+x}+30>\frac{2}{4+x}-20$

$0.2\:por\:100$

$cot^{\left(2\right)}xcos^{\left(2\right)}x=cot^{\left(2\right)}x-cos^{\left(2\right)}x$

$\int\frac{x^2+2x+6}{x^3-x}dx$

$\int\frac{3xe^{8x}}{2}dx$

$\lim_{x\to1}\left(\arctan\left(x\right)\right)^{\frac{1}{2x}}$

$8-5z=-10-2z$