$6\:\left(5x\:+\:3\right)\:$

$9n-3$

$\left(-546\right)+\left(-166\right)+\left(-295\right)$

$11=\frac{121}{x^2}$

$\frac{csc^2\left(x\right)-1}{tan\left(x\right)}cot^3\left(x\right)$

$\lim_{\left(x\right)\to\left(0\right)}\left(\frac{x+y}{y-x}\right)$

$\csc\left(x\right)-\cot\left(x\right)=\frac{\sin\left(x\right)}{1+\cos\left(x\right)}$