File:Hp42s battery compartment.jpeg - Wikimedia Commons
![Numeric Integration - HP -42S Manual [Page 25] | ManualsLib](https://static-data2.manualslib.com/product-images/8/713/71282/raw.jpg "Numeric Integration - HP -42S Manual [Page 25] | ManualsLib")
Numeric Integration - HP -42S Manual [Page 25] | ManualsLib
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