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h in (-oo:+oo)
0.007656 = (h^8)/3 // - (h^8)/3
0.007656-((h^8)/3) = 0
-1/3*h^8 = -0.007656 // : -1/3
h^8 = 0.022968
h^8 = 0.022968 // ^ 1/8
abs(h) = 0.022968^(1/8)
h = 0.022968^(1/8) or h = -0.022968^(1/8)
h in { 0.022968^(1/8), -0.022968^(1/8) }
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