a) 6x12-52:4= 72-13=59
(25+75):(53-48)= 100:5= 20
53-3x(43-19):6= 50x24:6= 1200:6= 200
b) (125:25=50):11= 55:11=5
(8x7-50)x6:4= 6x6:= 36:4=9
98+2x(38+31x2)= 100x(38+62)=100x100=10000
c) 126-10x2^3= 126-10x8=126-80=46
2500:10^2-5^2= 2500:100-25= 25-25=0
2^4x4:(71-39)=16x4:32=64:32=2
