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ay′(x)|y′(x)|+bsin(y(x))+y″(x)=0 ✗ Mathematica : cpu = 40.5905 (sec), leaf count = 0 , could not solve
DSolve[b*Sin[y[x]] + a*Abs[Derivative[1][y][x]]*Derivative[1][y][x] + Derivative[2][y][x] == 0, y[x], x]
✓ Maple : cpu = 2.365 (sec), leaf count = 56
{y(x)=ODESolStruc(_a,[{(dd_a_b(_a))_b(_a)+a_b(_a)|_b(_a)|+bsin(_a)=0},{_a=y(x),_b(_a)=ddxy(x)},{x=∫(_b(_a))−1d_a+_C1,y(x)=_a}])}
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