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c4x(64-28):6+5)=
d (90-(100-20)x3:6)x9=


Răspuns :

c4x(36:6+5)= c4x(6+5)=c4x11=44c
d(90-80x3:6)x9=d(90-240:6)x9=d(90-40)x9=dx50x9=450d