$\lim_{x\to0}\left(\frac{\sec\left(x\right)+1}{\cos\left(x\right)-1}\right)$
$-8+\left(-4y\right)$
$\left(2m+8f\right)^3$
$3sin^2\theta\:\:+\:sin\theta\:\:-\:2\:=0$
$\sin\left(60\right)=\frac{9}{x}$
$4-8cos^26x$
$\frac{sinx^4-cosx^4}{sin^2-cos^2}=1$
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