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a in (-oo:+oo)
a = (1/2)*(14+28)^29 // - (1/2)*(14+28)^29
a-((1/2)*(14+28)^29) = 0
a+(-1/2)*(14+28)^29 = 0
a-59319765547414180130949038898533674070977806336 = 0 // + 59319765547414180130949038898533674070977806336
a = 59319765547414180130949038898533674070977806336
a = 59319765547414180130949038898533674070977806336
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