Follow along with the video below to see how to install our site as a web app on your home screen.
Note: This feature may not be available in some browsers.
You are leaving out the effects of the emitter resistor. The final gain is divided by that resistor.
Edit: I looked again, and you have RE hidden in your gm calculation. That's good. I think you can simplify your result to:
(ro17||ro13B)/RE, ingoring the very small effect of base current.