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Q: how to perform a 7-base sum of two numbers?

A: To perform a 7-base sum of two numbers, you must first convert the numbers into their 7-base equivalents. For example, if you want to add the numbers 5 and 12, you would convert 5 to 7-base using the formula 5 = 4 * 7 + 5, which would give you 4 * 7 + 5 = 37. Similarly, 12 = 1 * 7 + 5 = 22. Then, you would add the two 7-base equivalents together, which in this case would be 37 + 22 = 59.