int(x^(7)-1)/(x^(2)sqrt(x^(4)+x^(2)+1))dx

int(x)/(x^(2)sqrt(x^(4)-1))dx

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

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

int(x^4-1)/(x^2sqrt(x^4+x^2+1))dx= sqrt(x^2+1/(x^2)+1)+C (sqrt(x^4+x^2+1))/(x^2)+C (sqrt(x^4+x^2+1))/x+C (d) none of these

Evaluate: int(1+x^(2))/((1-x^(2))sqrt(1+x^(2)+x^(4)))dx

int(xsin^(-1)(x^(2)))/(sqrt(1-x^(4)))dx=

int(x^(7/2))/(sqrt(x^(9)+1))dx

int(xsin^(-1)x^(2))/(sqrt(1-x^(4)))dx

int(xsin^(-1)x^(2))/(sqrt(1-x^(4)))dx

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