" iii) Integrate : "int(x^(2)-1)/(x^(4)+1)quad dx

Integrate : int(sin^(-1)x)^(2)dx

Integrate: int(3x^2)/(x^2+1)dx

Integrate : int(dx)/((x+1)^(2)+1)

Integrate int(sqrt(x^2+1))/x^4dx

Evaluate the following integrals int(x^(2)-1)/(x^(4)+1)dx

Statement-I: Integral of the form int (x^(2)+1)/(x^(4)+1)dx can be evaluated by substituting x-(1)/(x)=z . Statement II: Integral of the form int (x^(2)-1)/(x^(4)+1)dx can be evaluated by substituting x+(1)/(x)=z .

Integrate : int(1+x)/(1-2x-x^(2))dx