+45-(+63)

To solve the expression \( +45 - (+63) \), first simplify it:

\[ +45 - (+63) = 45 - 63 \]

Now, subtract \( 63 \) from \( 45 \):

\[ 45 - 63 = -18 \]

So, \( +45 - (+63) = -18 \).