$\frac{x^{10}-49}{x^5+7}$

$u=x+y^3-3$

$2\frac{1}{2}0+6\left(2^2+3^2\right)-4\left(4^2\right)$

$tan^{\left(2\right)}\theta\:+8\:tan\:\theta\:+6=0$

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

$\left(t^2+4\right)y'+2ty=t^2\left(t^2+4\right)$

$x-23>55$