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h2s + hno3 = s + no2 + h2okno2+ kClo3 = kCl + kno3CuO + nh3 = Cu + N2 + h2oрасст...
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Решите выражение:2cos^2x-cos^2x+2cosx-1=0...
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2;0] y=33x-30sinx+29...
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