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Through the use of three subtractions, the slope and curvature of $F_+^{K\\pi}$ are obtained directly from the data yielding $\\lambda_+'=(25.49 \\pm 0.31) \\times 10^{-3}$ and $\\lambda_+\"= (12.22 \\pm 0.14) \\times 10^{-4}$. The phase-space integrals relevant for $K_{l3}$ analyses are calculated. 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