Get the algebraic expressions in the following cases using variables,

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

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

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