Question 282408
first i suspect that you copied the problem incorrectly

27m^2 - 36 + 12  
I suspect it should be
27m^2 - 36m + 12 

You perform some magic with the equation changing m's to x's
and then the last line is completely a mystery what you are doing and why you are doing it.
assuming it should be 
27m^2 - 36m + 12 
3*(9m^2-12m+4)

*[invoke change_this_name4450 9, -12, 4, "m"]

*[invoke change_this_name4450 27, -36, 12, "m"]