`[[7,1,2],[9,2,1]][[3],[4],[5]]+2[[4],[5]]` is equal to

[[7,1,29,2,1]][[3,4,5]]+2[4,2] is equal to

{:[(7,1,2),(9,2,1)]:}{:[(3),(4),(5)]:}+2{:[(4),(2)]:} is equal to

If A=[[1,3,5],[-2,5,7]] and 2A-3B=[[4,5,-9],[1,2,3]], find B

A= [[-2,5,7] , [0,3,2], [9,4,1]] Find A' and |A|

If A={:[(1,2,3),(-2,5,7)]:}and2A-3B={:[(4,5,-9),(1,2,3)]:} then B is equal to

if [{:(3,2),(7,5):}]A{:[(-1,1),(-2,1):}]={:[(2,-1),(0,4):}] then trace of A is equal to

5 5/6+[2 2/3-{3 3/4(3 4/5 div 9 1/2)}] is equal to :- 5 5/6+[2 2/3-{3 3/4(3 4/5 div 9 1/2)}] किसके बराबर है ?