You can
put this solution on YOUR website!I'm guessing as to where your fractions begin and end. It helps us if you put the whole numerator in parentheses and the whole denominator in parentheses.
If I misinterpretted you, please let me know.
Add or subtract as indicated. Express your results in simplest form
5a – 12/ a^2 – 8a + 15 – 3a – 2/ a^2 – 8a + 15

Happy Calculating!!!