Strike through in math format

Hi - I am working on an activity for Partial Fraction Decomposition and the students are clicking through the steps listed as multiple choice and each step appears to the right as they click through. When they get to the step where they have to cancel common factors, is there a way to strikethrough the common factors in the math editor? In the past, I have uploaded pictures of the work and set those to appear as they click through the steps. Just thought I would try something different.

After a google search, \sout{ } is the latex notation for strikeout, but it doesn’t look it’s supported.