> with(linalg);


> A:=matrix(2,3,[[1,2,3],[2,4,5]]);

A :=	[ 1	2	3 ]
	[ 2	4	5 ]

> B:=matrix(2,3,[[0,3,4],[1,2,5]]);

B :=	[ 0	3	4 ]
	[ 1	2	5 ]

> C:=evalm(A+B);

C :=	[ 1	5	7 ]
	[ 3	6	10 ]

> D:=evalm(3*A);

D :=	[ 3	6	9 ]
	[ 6	12	15 ]

> T:=evalm(2*A+3*B+4*C);

T :=	[ 6	33	46 ]
	[ 19	38	65 ]