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a in (-oo:+oo)
2450 = (1/2)*a^(14^2) // - (1/2)*a^(14^2)
2450-((1/2)*a^(14^2)) = 0
(-1/2)*a^(14^2)+2450 = 0
-1/2*a^196 = -2450 // : -1/2
a^196 = 4900
a^196 = 4900 // ^ 1/196
abs(a) = 4900^(1/196)
a = 4900^(1/196) or a = -4900^(1/196)
a in { 4900^(1/196), -4900^(1/196) }
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