$m+7\ge12$

$\frac{\left(-\sqrt{5}\right)}{2}\frac{\left(4\right)}{2}$

$4\left(-8+11k\right)-4\left(-5k-10\right)$

$\left(3x+2y-1\right)\left(3x+2y+1\right)$

$\int\left(x\left(x-5\right)^2\right)dx$

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

$\int2t^3\left(t^4-3\right)^5dt$