2a, I think of a number and double it, 3 + a, I think of a number and add three to it, a2, I think of a number and multiply it by itself, 2n - 1, I think of a number, double it, then subtract one., 5a – 7, I think of a number, multiply by 5 then subtract 7, n/2, I think of a number and divide it by two, 2(x + 1), I think of a number, add one and double the answer, a3, I think of a number and multiply it by itself and itself again, m + n, I think of two numbers and add them together

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