Simplify the expression and find its value when

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

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 the expressions and evaluate them as directed: (i)

Simplify the expressions and evaluate them as directed: (i) x(x-3)+2 for x=1 (ii) 3y(2y-7)-3(y-4)-63 for y=2

(a) Simpify 3 xx (4x-5)+3 and find its values for (i) x=3 (ii) x=1/2. (j) simplify a(a^2+a+1)+5 and find its value for (i) a=0 (ii) a=1 (iii) a=-1

The value of the expression is

If x^(n) is the simplified form of the expression above, what is the value of n?

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 by combining like terms. (d^(8))/(d^(7))

Simplify the following expressions by combining like terms. b^(5)xxb^(7)