Get the algebraic expressions in the following cases using variables, constants and arithmetic operations.
(i) Subtraction of `z` from `y`.
(ii) One-half of the sum of numbers `x` and `y`.
(iii) The number `z` multiplied by itself.
(iv) One-fourth of the product of numbers `p` and `q`.
(v) Numbers `x` and `y` both squared and added.
(vi) Number `5` added to three times the product of numbers `m` and `n`.
(vii) Product of numbers `y` and `z` subtracted from `10`.
(viii) Sum of numbers `a` and `b` subtracted from their product.

Explanation

(i) `y-z`

(ii) `(x+y)/2`

(iii) `z xx z =z^2`

(iv) `p*q*1/4 = (pq)/4`

(v) `x^2+y^2`

(vi) `3mn+ 5`

(vii) `10-yz`

(viii) `ab-(a+b) = ab- a-b`

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