... just come up with an overly complicated function that achieves the same thing, like this one discovered by mightydog:

I'll pre-empt the “But the spec could say change the sign before processing...” defense. Anyone with a math level above 7th grade should know that multiplying by -1 will reverse the sign! We don't need a function called Add(num1,num2) because the + symbol is too confusing!

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