Evaluate
\sqrt{5}-2\sqrt{3}\approx -1.228033638
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\sqrt{5}+\sqrt{3}-3\sqrt{3}
Combine 3\sqrt{5} and -2\sqrt{5} to get \sqrt{5}.
\sqrt{5}-2\sqrt{3}
Combine \sqrt{3} and -3\sqrt{3} to get -2\sqrt{3}.
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