9b/a-b*a^2-ab/18b при a=4 с=46

9b/a-b*a^2-ab/18b = 9*46 / 4 — 46*4² — 4*46 / 18*46 =9*23 / 2 — 46*16 -4/18 =

103 1/2 — 736 -4/18 = -602 1/2 — 4/18 = -602 9/18 — 4/18 = -602 13/18