Derivative of ln(cosh(2x)) and cosh^(-1)(2x+1)-xsech^(-1)(x). Evaluate integral of e^x sinhx

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Derivative of ln(cosh(2x)) and cosh^(-1)(2x+1)-xsech^(-1)(x). Evaluate integral of e^x sinhx
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The first question isn't still clear.
Like what rule was used.
Is it chain rule orrr??

luyandomuzovu