Question

Calculate without a calculator using the most efficient method:

\( { (2001 \cdot 2021+100) \cdot (1991 \cdot 2031+400) \over 2011^4}\)

Difficulty level (1 very easy - 10 very hard): 4

Topics:
Algebra -> Algebraic Techniques -> Short Multiplication Formulas / Algebraic Identities
Sources:
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