Question 259792
If possible? Is there a doubt that it can be done?
{{{(matrix(2,2,2,-4,1,-1))(matrix(2,2,4,3,1,2))=(matrix(2,2,4,-2,3,1))}}}
{{{(matrix(2,2,2,-2,1,-1))(matrix(2,2,7,0,-1,5))=(matrix(2,2,16,-10,8,-5))}}}
{{{(matrix(2,2,4,-2,3,1))+(matrix(2,2,16,-10,8,-5))=(matrix(2,2,20,-12,11,-4))}}}