In reply to @DavidKButlerUoA

@DavidKButlerUoA 44^55 + 4455 ↔ 44^55 - 4455
49^5 + 495 ↔ 49^5 - 495
54^99 + 5499 ↔ 54^99 - 5499
76^5 + 765 ↔ 76^5 - 765
88^2 + 882 ↔ 88^2 - 882

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