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6. Daca a = 5 si b+c=12,calculați valoarea expresiilor:a) a+b+c=, b) 5a+2b+2c=, c) ab+ ac+11b+11c =,d) 2ab+2ac+9 =,e) 2ab+2ac+3b+3c+8=,f) 3ab4c+3ac + 4b+ 2011 =​