Examlex
Express in sigma notation, but do not evaluate. 3 + 4 + 5 + 6
Cost
The value of what is given up in exchange for something; often associated with financial expenditures but can also include time and effort.
Cohabitation
The state of living together and sharing a domestic life without being married.
United States
A country located primarily in North America, consisting of 50 states and a federal district.
Europe
A continent located entirely in the Northern Hemisphere and mostly in the Eastern Hemisphere, comprising various countries and cultures.
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