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Find the antiderivative for the given function.
`+ \ C`
Recall the integral formulas for hyperbolic functions, particularly the one involving the product of `csch` and `coth`. Consider how this formula changes when dealing with `9 x + 2` instead of just `x`.
Box 1: Enter your answer as an expression. Example: 3x^2+1, x/5, (a+b)/c
Be sure your variables match those in the question
`-csch(9 x+2)/9`