Monu prepared the following cash memos:

Check the cash memos and correct them if you find a mistake.

.Get the algebraic expressions in the following cases using variables, constants and arithmetic operations:

1. Subtraction of {tex}z{/tex} from {tex}y.{/tex}
2. One-half of the sum of numbers {tex}x{/tex} and {tex}y.{/tex}
3. The number {tex}z{/tex} multiplied by itself.
4. One-fourth of the product of numbers {tex}p{/tex} and {tex}q.{/tex}
5. Numbers {tex}x{/tex} and {tex}y{/tex} both squared and added.
6. Number 5 added to three times the product of {tex}m{/tex} and {tex}n.{/tex}
7. Product of numbers {tex}y{/tex} and {tex}z{/tex} subtracted from 10.
8. Sum of numbers {tex}a{/tex} and {tex}b{/tex} subtracted from their product.