$\:11n\left(2x-3y+52\right)-13x\left(-2x+3y-5z\right)$

$\frac{9}{11}+\frac{-4}{11}+\frac{-5}{11}$

$4cos^2x+2sin^2x-3=cos2x$

$x^2+2x-8<0$

$4p+3q-5+9$

$\frac{\cos\left(\theta\right)+cos\left(3\theta\right)}{2\cos\left(2\theta\right)}=cos\left(\theta\right)$

$\left(a^3-2a^2+a\right)^2$