Salut !
(10⁷×10²)/10³ = 10⁷⁺²/10³ = 10⁹⁻³ = 10⁶
(10¹×10²)/10³ = 10¹⁺²/10³ = 10³⁻³ = 10° = 1
10⁴/(10⁷×10³) = 10⁴/10⁷⁺³ = 10⁴⁻¹⁰ = 10⁻⁶
(10⁵)⁵/10⁵ = 10⁵ˣ⁵/10⁵ = 10²⁵⁻⁵ = 10²⁰
(10⁴×10²)/10⁹ = 10⁴⁺²/10⁹ = 10⁶⁻⁹ = 10⁻³
10⁸/(10¹×10²) = 10⁸/10¹⁺² = 10⁸⁻³ = 10⁵
(10³)⁴/10⁵ = 10³ˣ⁴/10⁵ = 10¹²⁻⁵ = 10⁷
(10²)⁴/10⁹ = 10²ˣ⁴/10⁹ = 10⁸⁻⁹ = 10⁻¹