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

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

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

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

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

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

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

int_(1)^(2) (x)/(sqrt(1+2x^(2)))dx

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

int(x+3sqrt(x^(2))+6sqrt(x))/(x(1+3sqrt(x)))dx

d/(dx)[cos^(-1)(xsqrt(x)-sqrt((1-x)(1-x^2)))]= 1/(sqrt(1-x^2))-1/(2sqrt(x-x^2)) (-1)/(sqrt(1-x^2))-1/(2sqrt(x-x^2)) 1/(sqrt(1-x^2))+1/(2sqrt(x-x^2)) 1/(sqrt(1-x^2)) 0 b. 1//4 c. -1//4 d. none of these