I am trying to figure out how to key in -2r^2-r-1; -1 in the search box for instantanuous rate of change, for some reason it looks like it does not like the semi-colon, what is the best way to write that?.
I'm not sure what this means.
Can you explain what you are trying to do? Guesing from your title, are you trying to calculate the derivative of -2r^2-r-1 at r = -1?
Here are some examples on how to do differentiation with Wolfram|Alpha: