Simplify the expression and find its value when a=5 and b=-3then `2(a^2+ab)+3-ab=`

Simplify the expression and find its value when a =5 and b=-3 then 2(a^2+ab)+3-ab

Simplify the following expression and then find its value when a = 2 and b = - 1 : 2(a^(2) - b^(2)) - [ 2a^(2) - { b^(2) - (a^(2)+b^(2) +ab)}]

Simplify these expressions and find their values if x=3, a-1 and b=-2 (i) 3x-5-x+9

Find the value of the expression: a^2-ab-2a+5b when a=2 and b=-3

Simplify and find the value of the following expression when a=3 and b=1: 4(a^2+b^2+2a b)-[4(a^2+b^2-2a b)-{-b^3+4(a-3)}]

Simplify the following expressions : 2/3 (3a+ 6b ) - 5a - 2/5 b

Simplify the following expressions. (5^(2))^(3)

State true or false : The value of ab is 8 when a = 3 and b = 2.

Simplify and find the value of the simplified expression when x=-1 and y=2. 4(x^2+3y^2)-(9xy-[5(2x^3-3y^2)+xy)]

Simplify and find the value of the simplified expression when x=-1 and y=2. 3(2x^2-4y^2)- [7xy-[3(x^3-2y^2)-2xy)]