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