Răspuns :
... = 2¹⁹⁹⁴ - (2¹⁹⁹⁰ *2² + 2¹⁹⁹¹ *2 + 2¹⁹⁹² *2) =
= 2¹⁹⁹⁴ - 2¹⁹⁹² - 2¹⁹⁹² - 2¹⁹⁹³ =
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= 2¹⁹⁹⁴ - 2¹⁹⁹³ - 2¹⁹⁹³ =
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= 2¹⁹⁹⁴ - 2¹⁹⁹⁴ = 0
= 2¹⁹⁹⁴ - 2¹⁹⁹² - 2¹⁹⁹² - 2¹⁹⁹³ =
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= 2¹⁹⁹⁴ - 2¹⁹⁹³ - 2¹⁹⁹³ =
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= 2¹⁹⁹⁴ - 2¹⁹⁹⁴ = 0