The question is read so that y=f(x) is a solution of the given differntial equation

where y= 1/sqrt(1+x^4)* int (1 to x) sqrt(1+t^4)dt and

y prime+((2x^3)(y))/(1+x^4)

I tried solving the integral from 1 to x using substitution u=1+t^4 but i still cant get it... please help me