Question: How to do looping when having different values of x and y?

Hello everyone. Really need help here. How am i going to do a loop with different values of x and y. 

For example this are the values,

I wish to do looping since the derivation is way too long and i have like 21 values of x and y each. i have no idea how to modify the coding for looping. Thank u in advanced :)

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