вычислите: (/- это корень) 2/5- /45+ /80
2/5 - /5 * /9 + /16 * /5 = 2/5 - 3/5 + 4/5 = 3/5
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2/5 - /5 * /9 + /16 * /5 = 2/5 - 3/5 + 4/5 = 3/5