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6. 4(3p+2)-6p = 12p+8-6p = 6p+8
7. 10p-(3-2p) = 10p(-3+2p) = -30p+20p = -10p
8. 6p+2(7p-2q) = 42p-12q+14p-4q = 28p-18q
9. 5(x-2y)-3(2x-y) = 5x+10y-6x+3y = -x+13y
10. -3(x-4y)+4(5x-3y) = -3x+12y+20x-12y = 17x
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