I hope this hasn't been previously asked. There are certain symbols that are used very, very often on math.se for which there isn't a preprogrammed TeX command for. The ones that jump immediately to mind are $\text{Spec}$, $\text{tr.deg}$ and $\text{Hom}$. Is there any way to make these widely used symbols into standard TeX so we don't have to type \text{} every time?