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plot(sqrt(68 + 20 x + 2 x^2) + sqrt(205 + 34 x + 2 x^2),x=-6.26..-6.21)
plot(sqrt(68 + 20 x + 2 x^2) + sqrt(205 + 34 x + 2 x^2),x=-6.26..-6.21)
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