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Right, now I can see my mistake, I was thinking exactly oposite(that there is right output is 2x^2).
English is not my native language, so I misunderstanded task)
Thank you for explaining, now I get it)
It's from description:
..."^1" should not be truncated when exponent = 2.
Yes, it will pass, but it shouldn't. If it pass it doesn't mean "it's correct".
won't pass when exponent = 2