Factor out .

Factor out .

Rewrite as .

Rewrite as .

Raise to the power of .

Multiply by .

Rewrite as .

Rewrite as .

Simplify i^7

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# Simplify i^7

Factor out .

Factor out .

Rewrite as .

Rewrite as .

Raise to the power of .

Multiply by .

Rewrite as .

Rewrite as .

Simplify i^7