5x (2x + 4y) =

4c²(a² - 2b² + d²) =

5(3c - 2) - 9c =

A is directly proportional to r² where r = 3 , A = 36, find the value of A when r = 10.

Simplify 3p + 7q - 2p - 5q.

If g = 3 calculate the value of 5g⁴.

-4e + (e - 1) =

If x = 2, y = - 3 and z = 4, find the value of 3x + y + z.

Simplify 6³ × 6² × 6⁷.

3a (a - 2b + 4c) =