Given:
Total sample space, n(s)=36.
To find the probability that the sum of the pips is 6 on the upward faces of the 2 dice:
A be an event of getting the sum as 6.
n(A)=5
Hence, the probability that the sum of the pips 6 is,

Hence, the answer is,
F(-3) = 4(-3) - 3 = -12 - 3 = -15.
H(2) = -5(2) + 7 = -10 + 7 = -3.
F(-3) + H(2) = -15 + -3 = -18.
The solution is -18.