3-(37+63)

To solve this expression, we need to work from inside the parentheses outwards, using the order of operations (parentheses, exponents, multiplication, division, addition, and subtraction).

First, within the parentheses, we have 37 + 63 which equals 100.

Now, we can simplify the expression to:

3 - 100

Finally, subtracting 100 from 3, we get:

-97

So, 3 - (37 + 63) equals -97.