`Equal Sums of Like Powers`

Integer Solutions of

a₁^h + a₂^h + a₃^h + a₄^h+ a₅^h + a₆^h + a₇^h

= b₁^h + b₂^h + b₃^h + b₄^h + b₅^h + b₆^h + b₇^h

( h = 1, 2, 3, 4, 5, 6, 8 )

[ -303, -177, -170, 47, 89, 250, 264 ] = [ -296, -226, -93 , -30, 173, 187, 285 ]
[ -725, -683, -424, 185, 479, 486, 682 ] = [ -746, -648, -445 , 241, 346, 605, 647 ]