Evaluate
\sqrt{70}+5\sqrt{2}-8\sqrt{35}-40\approx -71.890970188
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-40+5\sqrt{2}-8\sqrt{35}+\sqrt{35}\sqrt{2}
Apply the distributive property by multiplying each term of 5+\sqrt{35} by each term of -8+\sqrt{2}.
-40+5\sqrt{2}-8\sqrt{35}+\sqrt{70}
To multiply \sqrt{35} and \sqrt{2}, multiply the numbers under the square root.
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