Evaluate :
`( 2a + 3b )^3 + ( 2a - 3b )^3`

Evaluate : ( 2a + 3b ) - ( 2a - 3b )

Evaluate : (7)/(2a+3b)-(5)/(2a-3b)

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

Factroise (2a+3b)^3-(2a-3b)^3 .

Find the values of the following polynomials at a = -2 and b = 3 : a^3 + 3a^2b + 3ab^2 + b^3

Find the values of the following polynomials at a = -2 and b = 3 : a^3 - 3a^2b + 3ab^2 - b^3

If a = 2 and b = 3, find the value of (i) a + b (ii) a^(2) + ab (iii) ab - a^(2) (iv) 2a - 3b (v) 5a^(2) - 2ab (vi) a^(3) - b^(3)

4(2a-3b)^(2)+8(2a-3b)

Find the value of - (2a+3b) (2a-3b)