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30+(11-4)= 63-30+6= 59-9-8=
47+(18-9)= 75-(10+50)= 37+9-40=
51-40+9= 71-(14-7)= 8+(56-50)=
38+30= 60+20= 38+9= 38-8=
83-70= 7+85= 75-50= 63-7=
28+40= 44-40= 27-9= 17+60=
5+26= 91-8= 82-70= 15-9=
37+8-20= 23+7+46= 70-8-50=
42+(11-3)= 56+(45-5)= 81-(24+6)=
32+5+6= 5+48-8= 56-(2+38)=
40+37-8= 20-(16-9)= 36+60-70=
6×7+26+2×7 40-3×525
(8+16)-48+(16-4) 25-4×3(25-4)+3
73+7-6030 2×(36-30) (36-30)×2
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