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(2*6)+8+4 = 24
8-6+4=6. But 8-(6+4)=-2
here are all the possible combinations 6(12)+8 6(10)+10(2) 6(9)+8(2)+10 6(8)+8(4) 6(7)+8+10(3) 6(6)+8(3)+10(2) 6(5)+8(5)+10 6(5)+10(5) 6(4)+8(2)+10(4) 6(4)+8(7) 6(3)+8(4)+10(3) 6(2)+8+10(6) 6(2)+8(6)+10(2) 6+8(3)+10(5) 6+8(8)+10 8(10) 8(5)+10(4) 10(8)
-4
8(1/2) + 2(3/4) = 8/2 + 6/4 = 8x2/2x2 + 6/4 = 16/4 + 6/4 = 22/4 = 11/2 = 5 1/2. or 8/2 + 6/4 = 4 + 3/2 = 4 + 1 1/2 = 5 1/2