№760 (3) -0,01(9х+11b-90a)
№760 (4) 362/11n -21,2m
№764 (2) 4+a-b-c
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№760 (3) -0,01(9х+11b-90a)
№760 (4) 362/11n -21,2m
№764 (2) 4+a-b-c