The answer to your question is 11.25
1,100.226 is your answer :)
For the equation to work, you have to have the same number on both sides of the equal sign
so to find ?, you can do:
13 - 2 = 12 - ? Simplify
11 = 12 - ? Subtract 12 on both sides
-1 = - ? Multiply -1 on both sides
1 = ?
I think it's a rectangle block because the surface is flat on all the sides.
1 (((m^(-1)) (m^5)) / (m^(-2)))^(-3) =1/m^18