นิพจน์ 1: "y" equals StartFraction, left parenthesis, "x" plus 2.5 times 10 to the 8th power , right parenthesis Over 1 positive StartNestedFraction, left parenthesis, "x" times 2.5 times 10 to the 8th power , right parenthesis NestedOver 299792458 times 299792458 , EndNestedFraction , EndFractiony=x+2.5·1081+x·2.5·108299792458·299792458