$\sqrt{3}^{\frac{\sin\:\left(2x\right)}{\cos\:\left(x\right)}}$

$sen\:\left(x\right)^4\:-\:cos\:\left(x\right)^4=sen\:\left(x\right)^2-\:cos\:\left(x\right)^2$

$\frac{x^3+5x^2}{x^2-25}$

$25-100y^2$

$\frac{\left(9st\right)^{\frac{3}{2}}}{\left(27s^3t^{-4}\right)^{\frac{2}{3}}}\left(\frac{3s^{-2}}{4t^{\frac{1}{3}}}\right)^{-1}$

$-2v-\left(1-7v\right)+v-10$