• nb_events + 3
  Evaluates to the value of the nb_events cell + 3
• if (x1 > x2, "big", "small")
  Returns "big" if x1 > x2, "small" otherwise
• numval("column with space") * 2
  For column names with special characters, use strval("name") or numval("name")
• concat(col1, col2, col3)
  Concatenate the values in col1, col2 and col3