(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.

Explanation

(a) Expressions using ’t’ and ’4’

`t+4,t-4,4-t,4xx t,frac{t}{4},frac{4}{t}`

(b)Expressions using `y, 2` and `7`

`2y+7,2y-7,7-2y,frac{2y}{7},frac{7}{2y},2+7y,2-7y,7y-2,frac{7y}{2},frac{2}{7y}` and so on.