♨ANSWER♥
A summation, also called a sum, is the result of arithmetically adding numbers or quantities. A summation always contains a whole number of terms. There can be as few as two terms, or as many as a hundred, a thousand, or a million. Some summations contain infinitely many terms.
= 27
= -12 -15
= -27
☆...hope this helps...☆
_♡_mashi_♡_
