The mathematical expression to be evaluated is:

To simplify the expression, we first convert the mixed fraction to an improper fraction:

Substituting this value back into the original expression, we get:

Now we need to find a common denominator for the two fractions:

We can simplify the second fraction:

Finally, we can simplify the fraction by dividing both the numerator and denominator by their greatest common factor, which is 2:

Therefore, the simplified value of the mathematical expression is:
