matrixexp({{0,1,0},{0,0,1},{0,0,0}}) times matrixexp({{0,1,0},{1,0,0},{0,0,0}}) minus matrixexp({{0,1,0},{1,0,0},{0,0,0}}) times matrixexp( {{0,1,0},{0,0,1},{0,0,0}})