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4x 5 x. 125 X 25 X 4 25 X-20 5 X-5. 125х-25х+4 25х-20/5х-5. 125x 25x 4 25x 20 5x 5 4. 125^X-25^X+(4*25^X-20)/(5^X-5)<=4.
125 X 25 X 4 25 X-20 5 X-5. 125х-25х+4 25х-20/5х-5. 125x 25x 4 25x 20 5x 5 4. 125^X-25^X+(4*25^X-20)/(5^X-5)<=4.