Help with formula for compounding interest

Hi everyone. I’m having trouble with the correct formula for a compounding interest slider.

I tried to use the same formula from excel but it seems the plugin doesn’t register the ^ symbol as a function?

I’ve tried:


But the end calculation is never correct. I’ve tried several variations and when cross referencing against online compound interest calculators I can see the figures are always very far off.

Does anyone know what calculation I could use to get an accurate result?

Also as a side thing I’ve updated WP and now the sliders have a static ghost icon visible. Presume there’s an update coming that will address this?

This is the slider before and after sliding it across


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