Here's link to the answer:
tinyurl.com/wpazsebu
Answer:
14x+30y-20
Step-by-step explanation:
14(x+y)=14x+14y
14y+y=15y+15y=30y
and there is no like terms for -20 and 14x so the answer is
14x+30y-20
Step-by-step explanation:

r² (q + bx) = ax - p
qr² + bxr² = ax - p
qr² + p = ax - bxr²
qr² + p = x (a - br²)

Remember that the rule with multiplying exponents with the same base is to add the exponents together.
In this case: 
10^12 is your answer.