They are all prime numbers
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951 = 3 * (7 - 5)/2 * 317951 = 3 * (7 - 5)/2 * 317951 = 3 * (7 - 5)/2 * 317951 = 3 * (7 - 5)/2 * 317
2 + 5 = 7
2^3 * 3^2 * 5 * 7
7+2+2 or 5+3+37+2+2 or 5+3+37+2+2 or 5+3+37+2+2 or 5+3+3
2√20 - 3√7 - 2√5 + 4√63 = 2√(4 x 5) - 3√7 - 2√5 + 4√(9 x 7) = 4√5 - 2√5 - 3√7 + 12√7 = 2√5 + 9√7