Which of the following is the simplified form of `(1+x+x^2/4)/(1-x^2/4)=`

Which of the following is an equivalent form of (1.5x-2.4)^2-(5.2x^2-6.4) ?

Find the simplified form of 3x(4-2x)-2(x-5)

If f(x) = sin^(-1){(frac {4^((x +(1/2)))}{1+ 2^(4x)))} , which of the following is not the derivative of f(x)

Simplify : (1-2x+x^2)/(1-x^3)xx(1+x+x^2)/(1+x)