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12 questions
7 + 4
7 + 4 - 2
7 x 4
7 - 4
6x5x14
6+5+14
14-5-6
10x10x10
9x10x10
C310C_3^{10}C310
P310P_3^{10}P310
P55×P44P_5^5\times P_4^4P55×P44
P25×P44P_2^5\times P_4^4P25×P44
P25×P47P_2^5\times P_4^7P25×P47
P25×P77P_2^5\times P_7^7P25×P77
P66×P44P_6^6\times P_4^4P66×P44
P55×P55P_5^5\times P_5^5P55×P55
P56×P45P_5^6\times P_4^5P56×P45
C530C_5^{30}C530
C528C_5^{28}C528
C328C_3^{28}C328
C330C_3^{30}C330
C37×C46C_3^7\times C_4^6C37×C46
P37×P46P_3^7\times P_4^6P37×P46
C37×C46×P77C_3^7\times C_4^6\times P_7^7C37×C46×P77
P37×P46×C77P_3^7\times P_4^6\times C_7^7P37×P46×C77
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