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enter image description here

My guess is that since H(s) is parallel with 1(s) we'd do A(H - 1)? But this is my first diagram, so not sure.

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The dotted node looks like it's A(s), and the node after H(s) looks like it's A(s)H(s), so A(s)H(s) - A(s) = A(s)(H(s) - 1) looks like the overall transfer function.

If you're not sure, any linear systems theory book should have a section on simplifying signal flow diagrams like this.

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