August 2021 0 8 Report
1) вычислите : 5 в 4 ст*0,2 в -2 ст/125 в кв  2)решите уравнение : х+81 в -1ст=18
3)упростите выражение : (b+1/b-1-b/b+1):3b+1/2b-2
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