如何用2、4、4、7巧算24点 5
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2*(4*(7-4))
(2*4)*(7-4)
2*(4*(7-4))
(2*4)*(7-4)
2*((7-4)*4)
(2*(7-4))*4
2*((7-4)*4)
(2*(7-4))*4
4-((2-7)*4)
4*(2*(7-4))
(4*2)*(7-4)
4-(4*(2-7))
4+(4*(7-2))
4+((7-2)*4)
(4*(7-2))+4
4*((7-4)*2)
(4*(7-4))*2
4-((2-7)*4)
4*(2*(7-4))
(4*2)*(7-4)
4-(4*(2-7))
4+(4*(7-2))
4+((7-2)*4)
(4*(7-2))+4
4*((7-4)*2)
(4*(7-4))*2
((7-2)*4)+4
((7-2)*4)+4
((7-4)*2)*4
(7-4)*(2*4)
((7-4)*4)*2
(7-4)*(4*2)
((7-4)*2)*4
(7-4)*(2*4)
((7-4)*4)*2
(7-4)*(4*2)
(2*4)*(7-4)
2*(4*(7-4))
(2*4)*(7-4)
2*((7-4)*4)
(2*(7-4))*4
2*((7-4)*4)
(2*(7-4))*4
4-((2-7)*4)
4*(2*(7-4))
(4*2)*(7-4)
4-(4*(2-7))
4+(4*(7-2))
4+((7-2)*4)
(4*(7-2))+4
4*((7-4)*2)
(4*(7-4))*2
4-((2-7)*4)
4*(2*(7-4))
(4*2)*(7-4)
4-(4*(2-7))
4+(4*(7-2))
4+((7-2)*4)
(4*(7-2))+4
4*((7-4)*2)
(4*(7-4))*2
((7-2)*4)+4
((7-2)*4)+4
((7-4)*2)*4
(7-4)*(2*4)
((7-4)*4)*2
(7-4)*(4*2)
((7-4)*2)*4
(7-4)*(2*4)
((7-4)*4)*2
(7-4)*(4*2)
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