Regular expression for simple math expressions

Question

As an exercise I was trying to come up with a regex to evaluate simple algebra like

q = \'23 * 345 - 123+65\'

From here I want to get \'23\', \

Answer 1

I can only speak of regex in general, as I don't know python, but your problem is that in

(\d+\s*[\*/+-]\s*)+(\d+\s*)

This portion

(\d+\s*[\*/+-]\s*)+

Is being repeated and when it's completely done evaluating, you only see the final one.