361 ^ - 1/2 = = 1 / 19
216 ^ 1/3 = ( 6 ^3 ) ^ 1/3 = 6
343 ^ 2/3 = ( 7 ^3 ) ^ 2/3 = 7 ^ 2 = 49
125 ^ 1 ( 1/3 ) = 125 ^ 4/3 = ( 5^3 )^4/3 = 5 ^ 4 = 625
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6 + 49 - 625 = 55 - 625 = - 570
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1 / 19 * ( - 570 ) = - 570/19 = - 30