area between -0.00000086x^4+0.00012x^3-0.00466x^2+0.1463x-12.18156 and -0.000000000005x^6 - 0.000000004x^5 + 0.0000009x^4 - 0.0001x^3 + 0.0078x^2 - 0.3838x + 13.299

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