(a) Form expressions using t and 4. Use not more than one number operation. Every expression must have t in it.
(b) Form expressions using y, 2 and 7. Every expression must have y in it. Use only two number operations. These should be different.
(a) t+4, t-4, 4t, , , 4+t, 4-t
(b) 2y+7, 7y+2, 2y-7, 7y-2 and lot more