In class, we derived that
1/(n(n + 1)) = 1/n - 1/(n + 1)
Fill in the blanks to make a true equation:
1/(n(n + 3)(n + 8)(n + 15)) = ___/n + ___/(n + 3) + ___/(n + 8) + ___/(n + 15)
+837 
