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Mathematics 15 Online
OpenStudy (anonymous):

Simplify the expression. (Do not expand the expression in the denominator.) ((e^(7x) + e^(-7x) (e^(7x) + e^(-7x) - (e^(7x) - e^(-7x)(e^(7x) - e^(-7x)) / ((e^(7x) + e^(-7x))^2

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