(450:5:(3×6)+35)×7-140+(540÷60+7)×(63:9)

Răspuns :

(450:5:18+35)*7-140+(9+7)*7=
(90:18+35)*7-140+16*7=
(5+35)*7-140+112=
40*7-140+112=
280-140+112=
140+112=252