14 Efectuați:
a) 420 +7.{8+5.[39-6.(1707-63.27)]}-2^4;
c)2*{10+ 3.(150-5-(347-17-20)]} + 216-3^4;
b)79+10.{1+6-12+5.(2077-83-25)]}-9^2
d)3*{12+ 4.[5+7(1037-45.23)]} + 10^2 -50.
Va roooggg!!!!! ​