Question 904449
{{{3*(matrix(3,3,-2,3,10,8,6,4,5,-1,7))-4*(matrix(3,3,3/4,6,1/2,3,-5,7,2,5,9))+3*(matrix(3,3,2,-1,4,3,7,-4,4/3,-1/3,5/3))=(matrix(3,3,-6,9,30,24,18,12,15,-3,21))-(matrix(3,3,3,24,2,12,-20,28,8,20,36))+(matrix(3,3,6,-3,12,9,21,-12,4,-1,5))}}}
{{{3*(matrix(3,3,-2,3,10,8,6,4,5,-1,7))-4*(matrix(3,3,3/4,6,1/2,3,-5,7,2,5,9))+3*(matrix(3,3,2,-1,4,3,7,-4,4/3,-1/3,5/3))=(matrix(3,3,-6-3+6,9-24-3,30-2+12,
24-12+9,18-(-20)+21,12-28-12,
15-8+4,-3-20-1,21-36+5))}}}
{{{3*(matrix(3,3,-2,3,10,8,6,4,5,-1,7))-4*(matrix(3,3,3/4,6,1/2,3,-5,7,2,5,9))+3*(matrix(3,3,2,-1,4,3,7,-4,4/3,-1/3,5/3))=(matrix(3,3,-3,-18,40,21,59,-28,11,-24,-10))}}}