Find the sum, solution, and product of the following problems:

$$(+8) + (7) = 8 + 7 = 15$$

The sum is $\boxed{15}$.

b)

$$(+12) + (-4) = 12 - 4 = 8$$

The sum is $\boxed{8}$.

c)

$$(-12) + (-26) = -12 - 26 = -38$$

The sum is $\boxed{-38}$.

d)

$$(25) + (-20) = 25 - 20 = 5$$

The sum is $\boxed{5}$.

Question 2: Find the solutions to the following:

a)

$$4 + 3 = 7$$

The solution is $\boxed{7}$.

b)

$$3 + 25 = 28$$

The solution is $\boxed{28}$.

c)

$$-38 + 4 = -34$$

The solution is $\boxed{-34}$.

d)

$$98 - 28 = 70$$

The solution is $\boxed{70}$.

Question 3: Solve the following multiplication problems:

a)

$$-108$$

The product is $\boxed{-108}$.

b)

$$-336$$

The product is $\boxed{-336}$.