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

$9x^6+18x^3+9$

$\frac{d}{dx}\left(4+3x=\cos\left(xy^2\right)\right)$

$\frac{1}{2}\left(x-4\right)\ge\frac{1}{4}x-1$

$0.3\sqrt{0.275}$

$tan\left(\:x\right)+\frac{1}{tan\left(x\right)}=\frac{\sec\left(x\right)}{\cos\left(x\right)}$

$\left(\frac{5}{2}x-\frac{3}{8}y+\frac{2}{7}z\right)-\left(\frac{1}{2}x+\frac{3}{4}y-\frac{5}{7}z\right)$