\"\"

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The 15th term of the sequence is 66 and common difference d = 4.

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Apply nth term of an arithmetic sequence formula: \"\".

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\"\"            (Substitute \"\" and \"\")

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\"\"             (Substitute \"\")

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\"\"                   (Subtract: \"\")

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\"\"                            (Multiply: \"\")\"\"

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Apply subtraction property of equality: a = b then \"\".

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\"\"            (Subtract 56 from each side)

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\"\"                                     (Subtract: \"\")

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Find the nth term of the sequence, substitute \"\" and d = 4.

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\"\"

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Distribute terms using distributive property: \"\".

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\"\"

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\"\"                              (Subtract: \"\")\"\"

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The nth term of the arithmetic sequence equation is \"\".