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Verified answer

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5^-7 x 2^-7 = 10^-7
(2^4)^-1 = 2^-4
7^-6 x 7^8 = 7 ²
4^-3 x 25^-3 = 100^-3
((-1.5)^3)^4 x ((-2^6)² = -1.5^12 x -2^12 = 3^12
2^18/2^14 = 2^4
2^3/5^3 = 0.25^3
(12/25)² x (5/6)² = (60/150)² = (2/5)²

A = 56 x 10^6/14 x 10^-3
4 x 10^9 = 4 000 000 000

B = 18 x 10/15 x 10^5
1.2 x 10^-4 = 0,00012

130 km/h = 130 000 : 3600 =36.11 m/s
3.5m/s = 0.0035 x 3600 =12.6 km/h

5.04 m3 = 5040dm3 = 5040 L
5040L/h = 5040 x 3600 = 18  144 000 L/s

1879 kg/m3 = 1 879 000 x  x 1 000 000 = 1.879 x 10^12 = 1879000000000g/cm3