Find value of expression

Hi I can use help on both of these problems sorry for putting two problems in one image but I couldn't crop it
 
Have you considered substituting the given values.

Give x = 3 and y = 4

The expression x + y takes on the value 3 + 4. Like that.
 
Rewrite the entire problem exactly as given with two exceptions--wherever you see x replace it with (3) and wherever you see y replace it with (4).

Post back showing us how far you can get.
 
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