What is (A+B)⁷?
You do A⁷
Next you do (A+A+A+A+A+A) times B which equals A⁶B
Next you do (A+A+A+A+A) times (B+B) which equals A⁵B²
Next you do (A+A+A+A) times (B+B+B) which equals A⁴B³
Next yo do (A+A+A) times (B+B+B+B) which equals A³B⁴
Next you do (A+A) times (B+B+B+B+B) which equals A²B⁵
Next you do A times (B+B+B+B+B) which equals AB⁶
Lastily you do B⁷
Now you put the answer together
=A⁷ + A⁶B + A⁵B² + A⁴B³ A³B⁴ + A²B⁵ + AB⁶ + B⁷
Now you put the answer together
=A⁷ + A⁶B + A⁵B² + A⁴B³ A³B⁴ + A²B⁵ + AB⁶ + B⁷
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