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(20+48)-( 40+8):2=

[6:2.8+(20.4-30)+7]:3+12=

68:17.12-8=

{4.6-2.50+[125-92]-44.2}.(200:4.2):100=

(38:2+8.16)-[6:3.18+(28-14)]=

128-36.2+[49-13+(54:6.2)]-60=

8:(3-5)-2.[-3.(1-4)-6:(1-3)]=

25.3-8+45:5-(40-8:2.5)-33=

[4.25-(18+36-10).2+3]+3.5=

30

50

39

-7

40

97

-131

44

23