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1+420=20^{2}+21
Multiply 20 and 21 to get 420.
421=20^{2}+21
Add 1 and 420 to get 421.
421=400+21
Calculate 20 to the power of 2 and get 400.
421=421
Add 400 and 21 to get 421.
\text{true}
Compare 421 and 421.
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Matrix
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Limits
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