a) 3.5^2+ 15.2^2 – 26:2
=3.25+15.4-26:2
=75+60-13=122
b) 5^3.2 – 100 : 4 + 2^3.5
=125.2-25+8.5
=250-25+40
=265
c) 6^2 : 9 + 50.2 – 3^3.3
=36:9+100-27.3
=4+100-81
=23
d) 3^2.5 + 2^3.10 – 81:3
=9.5+8.10-27
=45+80-27
=98
e) 5^13 : 5^10 – 25.2^2
=5³-25.4
=125-100
=25
f) 20 : 2^2 + 5^9 : 5^8
=20:4+5
=5+5
=10
g) 100 : 5^2 + 7.3^2
=100:25+7.9
=4+63
=69
h) 84 : 4 + 3^9 : 3^7 + 5^0
=21+3²+1
=21+9+1
=31
i) 29 – [16 + 3.(51 – 49)]
=29-[16+3.2]
=29-[16+6]
=29-22
=7
j) 5.2^2 + 98:7^2
=5.4+98:14
=20+7
=27
k) 3^11 : 3^9 – 147 : 7^2
=3²-147:49
=9-3
=6
l) 295 – (31 – 2^2.5)^2
=295-(31-4.5)²
=295-(31-20)²
=295-11²
=295-121
=174
m) 7^18 : 7^16 +2^2.3^3
=7²+4.27
=49+108
=157