x⁷ ÷ x² = what?

4a⁴- 6a³+ 3a + 14 is an algebraic expression.
(i) a is the variable of the polynomial expression
(ii) Degree of the polynomial is 4
(iii) 6 is the coefficient a³
Which one of the following is correct based on the above information?

a⁵ × (-a³) × a^-5 = what ?

What is the simple solution of [2 - {(1 + 1) -2}]?

Which one of the following is the product of 3a²b and - 4ab² ?

Which one of the following is the quotient if 20a⁶b³ is divided by  4a³b?

Two Algebraic expressions are x + 1 and x - {x - (x - y)}. Which of the following is the value of the second expression?

- 25x³y/5xy³ = what?

If a ≠ 0, what is the value of a⁰?

If a = 3, b = 2, what is the value of (8a - 2b) + (- 7a + 4b) ?