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5²⁵/5¹⁰ = 5¹⁵
b) (7²¹ - 7¹⁹) / 49⁹ = 7²/7¹⁸ =7⁻¹⁶
[(3¹⁸+3¹⁶)×27] = [3³⁴ * 3³]=3³⁷
b)336
c)1,16¹⁰
a).( 5¹³ + 5¹²) / 5¹⁰ = 5²⁵/5¹⁰=5¹⁵
b). (7²¹ - 7¹⁹) / 49⁹ =(7²¹ - 7¹⁹) / 7¹⁸=7² / 7¹⁸=7⁻¹⁶
c). [(3¹⁸+3¹⁶)×27] = (3³⁴)*3³=3³⁷