$60x\:=\:18x$
$56d\:+\:7f$
$x-3=4$
$\frac{\left(1-sin2x\right)}{cos2x}=\frac{\left(cosx-sinx\right)}{\left(cosx+sinx\right)}$
$2^x=2$
$\lim_{x\to\infty}\left(\frac{x^2-16}{x-4}\right)$
$\left(a+3\right)\left(w-2\right)$
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