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Use the indicated substitution to evaluate the integral.
42csc (7x)cot (7x)dx, u=7x
42csc (7x)cot (7x)dx=|
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Use the indicated substitution to evaluate the integral. 42csc (7x)cot (7x)dx, u=7x 42csc (7x)cot (7x)dx=|

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