Question: I need to write a program with a combo box, where the items in the combo box will Add, Subtract, multiply, and divide. I have

I need to write a program with a combo box, where the items in the combo box will Add, Subtract, multiply, and divide. I have these already stated in combo box but have no idea how to write it so it takes effect in the program. What do I need to do so it actually adds when suppose to and subtract.

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