Ok another one

dy/dx = 2y/1- x^4

sol: y = C|1+x/1-x|^1/2 e^arctanx

Very confusing this is how i start out:

=> |2y dy = | 1/1-x^4 dx

=> y^2 = 1/4 lnu

=> y^2 = 1/4 ln(1-x^4) +c

=> y = (1/4 ln(1-x^4)+c )^1/2

then im lost, and ive probably stuffed it up right from near the start. im not sure if i should be using integration by substitution when integrating the x side.

Help appreciated