Calculation [(a ^ m + 1) (b ^ n) (C ^ 2)] ^ 3

Calculation [(a ^ m + 1) (b ^ n) (C ^ 2)] ^ 3

=(a^m+1)^3(b^n)^3(c^2)^3
=a^(3m+3(b^3n)(c^6)

1+a^1+a^2+a^3+.+a^n=?
Can I change 1 + A ^ 1 + A ^ 2 + A ^ 3 +. + A ^ n into a non-n term addition formula?

When a = 0, Sn = 1
When Sn = 1
When a is not equal to 1 and 0,
Sum formula of equal ratio sequence Sn = A1 (1-Q ^ n) / (1-Q)
=（1-a^n）/（1-a）
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If loga2 = m and loga3 = n, then the power of A2M + n is equal to?
A. B, C, D are 12, 7, 6, 5, that's right,

The answer is a, 12
In the title, a ^ (2m + n) = (a ^ m) ^ 2 * (a ^ n) = 2 ^ 2 * 3 = 4 * 3 = 12, so choose a