นิพจน์ 1: "f" left parenthesis, "x" , "y" , right parenthesis equals "x" "y" squaredfx,y=xy2
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นิพจน์ 2: Start integral from 0 to 1, end integral, Start integral from 0 to 2, end integral, "f" left parenthesis, "x" , "y" , right parenthesis "d" "x" "d" "y"∫10∫20fx,ydxdy