$350-\left(7-2+5\right)-\left(6+3\right)\left(9+8-2\right)$

$\frac{1}{2}^2y^2+9y^4+36$

$\sqrt{x}+\sqrt{4x}+\sqrt{9x}+\sqrt{16x}-\:2\sqrt{25x}$

$\left(\frac{1}{m^7\cdot\:m^8}\right)$

$\frac{4}{9}x^4+\frac{1}{3}+\frac{1}{4}x^{-4}$

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

$\int\left(3x+2\right)sen\left(3x\right)dx$