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

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

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

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

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

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

int (1+sqrt(x))/(1+4sqrt(x))dx=(4)/(5)x^((5)/(4))-x+(8)/(3)x^((3)/(4))-4x^((1)/(2))+8x^((1)/(4))-8 log|x^((1)/(4))+1|+c

int(sqrt(x))/(1+4sqrt(x^(3)))dx is equal to

int(sqrt(x))/(1+4sqrt(x^(3)))dx is equal to

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

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