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We compute the polylogarithmic parts of the two-loop four and five-gravitonamplitudes where the external helicities are positive and express these in asimple compact analytic form. We use these to extract the $\ln(\mu^2)$ termsfrom both the four and five-point amplitudes and show that these match the same  $R^3$ counterterm.

Two-Loop Gravity amplitudes from four dimensional Unitarity