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x2(x2−1)d2dx2y(x)−2x3ddxy(x)−((a−n)(a+n+1)x2(x2−1)+2ax2+n(n+1)(x2−1))y(x)=0
Mathematica: cpu = 14.232807 (sec), leaf count = 115 \left \{\left \{y(x)\to \text {DifferentialRoot}\left (\{\unicode {f818},\unicode {f817}\}\unicode {f4a1}\left \{-2 \unicode {f818}'(\unicode {f817}) \unicode {f817}^3+\left (a^2 \unicode {f817}^4-n^2 \unicode {f817}^4+a \unicode {f817}^4-n \unicode {f817}^4-a^2 \unicode {f817}^2+2 n^2 \unicode {f817}^2+a \unicode {f817}^2+2 n \unicode {f817}^2-n^2-n\right ) \unicode {f818}(\unicode {f817})+\left (\unicode {f817}^4-\unicode {f817}^2\right ) \unicode {f818}''(\unicode {f817})=0,\unicode {f818}(2)=c_1,\unicode {f818}'(2)=c_2\right \}\right )(x)\right \}\right \} \left \{\left \{y(x)\to \text {DifferentialRoot}\left (\{\unicode {f818},\unicode {f817}\}\unicode {f4a1}\left \{-2 \unicode {f818}'(\unicode {f817}) \unicode {f817}^3+\left (a^2 \unicode {f817}^4-n^2 \unicode {f817}^4+a \unicode {f817}^4-n \unicode {f817}^4-a^2 \unicode {f817}^2+2 n^2 \unicode {f817}^2+a \unicode {f817}^2+2 n \unicode {f817}^2-n^2-n\right ) \unicode {f818}(\unicode {f817})+\left (\unicode {f817}^4-\unicode {f817}^2\right ) \unicode {f818}''(\unicode {f817})=0,\unicode {f818}(2)=c_1,\unicode {f818}'(2)=c_2\right \}\right )(x)\right \}\right \}
Maple: cpu = 0.172 (sec), leaf count = 109 {y(x)=_C1HeunC(0,−n−12,−2,−a24+n24−a4+n4,−n24−n4+34+a24−a4,x2)x−n+_C2HeunC(0,n+12,−2,−a24+n24−a4+n4,−n24−n4+34+a24−a4,x2)xn+1}
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