$7\cdot\left(-3-\left(-5\right)\right)+\frac{25}{5}$

$\frac{\left(x^4+8^1x^2+8\right)}{x^3-4x}$

$2x^4-6x^2+4$

$\sqrt{7x^{1+m}}+\sqrt{6x^{2+m}}+\sqrt{5x^{3+m}}$

$\frac{sin^2acota}{tana}$

$\left(\frac{8x^{-\frac{3}{4}}bc^{-\frac{1}{2}}}{27xb^{\frac{3}{4}}}\right)^{\frac{2}{3}}$

$\int-x\csc x^2dx$