$\ln\left(x^2-25\right)=0$

$2 x - 11 = 3$

$\left(-500\right)+\left(-680\right)$

$8x^28x^28x^28x^2$

$2\sqrt{x}+\frac{y^2}{3}^2$

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

$4x^2-21x+5$