$x-4<-3$

$8-2+c+6+4$

$t^6+5\:t^6-9$

$\int_{-\frac{\pi}{2}}^{\frac{\pi}{2}}\left(x\sin\left(nx\right)\right)dx$

$\frac{x^2-\left(y+2\right)^2}{xy-y^2-2y}$

$\:\frac{\left(sin\left(3x\right)+sin\left(x\right)\right)}{cos\left(3x\right)+cos\left(x\right)}$

$9\csc x-4=11\:csc\:x$