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Sum of is a grouping symbol. 7*(2+5)
An equal sign
"x" is the symbol for product or multiple: not sum. Consequently the question is unclear.
The Greek symbol for the sum is Σ (sigma). It is used in mathematics to represent the summation of a series of numbers or expressions. The notation typically includes an index that specifies the starting and ending values for the summation. For example, Σ from i=1 to n indicates the sum of a sequence of terms from i=1 to n.
Oh, dude, drawing a flowchart for the sum of even numbers between 0 and 20 is like making a sandwich - you just gotta follow the steps. Start with a box labeled "Start" and draw arrows to boxes for each even number from 0 to 20. Connect those boxes to a box labeled "Sum" and voila, you've got yourself a flowchart for adding up those even numbers. It's as easy as eating pie... mmm, pie.