3*a 2*(a - 55) --- + ---------- 5 5
(3*a)/5 + (2*(a - 55))/5 при a = -1
(3*a)/5 + (2*(a - 55))/5
(3*(-1))/5 + (2*((-1) - 55))/5
(3*(-1))/5 + (2*(-1 - 55))/5
-23
-22 + a
-22.0 + 1.0*a