7) m^15 • (n^6)³ / (mn)^17 = m^15 • n^18 / m^17n^17 = m^-2n

5^-2 •15 = 3/5

8) x¹⁴ y^15 / x¹³y¹³ = xy²

10• 7² = 490

9) a^16b²¹ / a^18b^18 = a^-2b³

2^-2 • 6³ = 1/4 • 216 = 54

10) p^27 g²⁴ / p²³g²³ = p⁴g

2⁴•4 = 16•4 = 64

11) c^20d^16 / c^19d^19 = cd^-3

20• 10^-3= 2•10^-2 = 0,02

12) z^28t^29 / z^26t^26 = z²t³

10²•3³ = 100• 27= 2700