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x in (-oo:+oo)
a = (1/2)*x^16*x^28 // - (1/2)*x^16*x^28
a-((1/2)*x^16*x^28) = 0
a+(-1/2)*x^44 = 0
-1/2*x^44 = -a // : -1/2
x^44 = 2*a
x^44 = 2*a // ^ 1/44
abs(x) = 2^(1/44)*a^(1/44)
x = 2^(1/44)*a^(1/44) or x = -(2^(1/44)*a^(1/44))
x in { 2^(1/44)*a^(1/44), -(2^(1/44)*a^(1/44)) }
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