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y″(x)=−y(x)sec2(x)(2x2+x2sin2(x)−24cos2(x))4x2−tan(x)y′(x)+cos(x) ✓ Mathematica : cpu = 0.200507 (sec), leaf count = 46
{{y(x)→15c2x3cos(x)+c1cos(x)x2−14x2cos(x)}}
✓ Maple : cpu = 0.119 (sec), leaf count = 32
{y(x)=_C2x2cos(x)+cos(x)x3_C1−x24cos(x)}
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