tolong pakai jalan seperti diatas

1. 49+35= 84
2.64+36= 100
3.100-81= 19
4.225-121= 104
5.15²-10²= 225-100= 125
6.13²x3²= 169+9= 178
7.144:4= 36
8.100x49:25= 196
9.12²-11²= 144-121= 23
10.81x121:9= 8x121= 968
11.20²:10²-3²= 400:100-9= 4-9= -5
12. 64+25-36= 89-36= 53
13.225-81+9= 144+9= 153
14.13²+10²-3²= 169+100-9= 260
15.8²-4²+7²= 64-36+49= 28+49= 77
16.15²x10²:3²= 225x100:9= 2500
17.26²-26²= 0
18.100x9+25-121= 900+(-96)= 804
19.20²+15²:4²+3²= 400+225:16+9= 625:25= 25
20.50²-20²:3²+1²= 2500-400:(9+1)= 2500-40= 2460

maaf kalo ada yang salah.