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lot (20-x) +1/(0.0296568) + (70-1/(0.0296568))*exp(-x*(0.0296568)) from 0 to 30 with grid
lot (20-x) +1/(0.0296568) + (70-1/(0.0296568))*exp(-x*(0.0296568)) from 0 to 30 with grid
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