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Răspuns:
2^9x2^11=2^20
5^3x5^12=5^15
7^19:7^11=7^8
3^23:3^12=3^11
(2^9)^11=2^99
(5^3)^7=5^21
2^9x3^9=6^9
7^12x2^12=14^12
12^9x4^9=48^9
24^11x8^11=192^11