6 \sqrt{ 21+ \frac{ ++++42 \% 2 }{ } }
Evaluate
6\sqrt{21}\approx 27.49545417
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6\sqrt{21+\frac{0}{1}}
Divide 42 by 2 to get the remainder 0.
6\sqrt{21+0}
Anything divided by one gives itself.
6\sqrt{21}
Add 21 and 0 to get 21.
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