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Calculati:
3 5 3 2
a)5x[5+5x(5-5:5)]+3x5;

10 8 7 5
b) (6+2:2) :10-9x10;

38 37 45 44
c)7 : 7 : 7+3 : 3 : 3;

6 ( 2)3 2
d)7:{7+7x(7-(7 ) + 1] }+2x7 -69

[ajutor mult]