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u in (-oo:+oo)
36*u^7-(u^3*((32*u^5)/4)) = 0
36*u^7-8*u^8 = 0
36*u^7-8*u^8 = 0
4*u^7*(9-2*u) = 0
9-2*u = 0 // - 9
-2*u = -9 // : -2
u = -9/(-2)
u = 9/2
4*u^7 = 0
4*u^7 = 0 // : 4
u^7 = 0
u = 0
u in { 9/2, 0 }
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