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ddxy(x)=−i(ix+x4+2x2(y(x))2+(y(x))4)y(x)=0
Mathematica: cpu = 31.239967 (sec), leaf count = 39 DSolve[y′(x)=−i(x4+2x2y(x)2+y(x)4+ix)y(x),y(x),x]
Maple: cpu = 0.312 (sec), leaf count = 243 {y(x)=−i22Ai(−−8i3x)_C1+2Bi(−−8i3x)−2i(Ai(−−8i3x)_C1+Bi(−−8i3x))(−_C1(−3+i)Ai(1)(−−8i3x)2+(32−i2)Bi(1)(−−8i3x)+i(Ai(−−8i3x)_C1+Bi(−−8i3x))x2),y(x)=i22Ai(−−8i3x)_C1+2Bi(−−8i3x)−2i(Ai(−−8i3x)_C1+Bi(−−8i3x))(−_C1(−3+i)Ai(1)(−−8i3x)2+(32−i2)Bi(1)(−−8i3x)+i(Ai(−−8i3x)_C1+Bi(−−8i3x))x2)}
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