表达式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
1
表达式2: "y" equals 299792458y=299792458
negative 10−10
2.9 9 7 9 2 5 times 10 to the 8th power2.997925×108
