Remember that when we multiply powers of the same number, we add, and when we divide powers of the same number, we subtract.
a to the power of 2 multiplied by a to the power of 7 multiplied by a to the power of 3 is a multiplication, so we add the powers.
The powers 2, 7 and 3 can be added together: 2 + 7 + 3 = 12.
So, a to the power of 2 multiplied by a to the power of 7 multiplied by a to the power of 3 = a to the power of 12.
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