a) 9-7+5+2.6+8:4 = 2+5+12+2= 21
b)10:2+5.3+4-5.2-4.2+16+.4 = 5+15+4-10-8+16+4= 26
c)(15-4)+3-(12-5.2)+5+(4+16:4)= (11)+3-(12-10)+5+(4+4)= 13-2+5+8= 24
d) (30-8)+[5-(2.5)]= (22)+ (5-10)= 22-5= 17
e) 5.[ 3+2(2+5)]-10:2= 5(3+2(7))-5= 5(3+14)-5= 85-5=80
f) [(3+12-5):2-4+5](4+2.3)= ((10):2-4+5)(10)= (6)(10)= 60
g)5+{2[8:(6-2)]-2}+3= 5+{2[8:(4)]-2}+3= 5+{2(2)-2}+3 = 5+2+3= 11
h)45-{7+[9:(2+1)]}.2= 45-{7+[9:(3)]}= 45-{7+(3)}=45-10=35