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a. 9x+6y-10y-8x
b. 6q²-8q+q²-2q
c. x²+8y²-16+10x²-7y²+11
d. 18a-5(a-3b)
e. 8(3x+4y) -5(4x-6y)
f. 5x(4x-3y)-3x(5x+2y)
g. a(a+3b)+2a(4a+5b)
a. 9x+6y-10y-8x
b. 6q²-8q+q²-2q
c. x²+8y²-16+10x²-7y²+11
d. 18a-5(a-3b)
e. 8(3x+4y) -5(4x-6y)
f. 5x(4x-3y)-3x(5x+2y)
g. a(a+3b)+2a(4a+5b)
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b.6xkuadrat-8q+qkuadrat-2q=7qkuadrat-10q
c. x²+8y²-16+10x²-7y²+11=x²+10x²+8y²-7y²-16+11=11x²+y²-5
d.18a-5(a-3b)=18a-5-a+3b=17a+3b-5
e.8(3x+4y)-5(4x-6y)=24x+32y-20x+30y=4x+12y
f.5x(4x-3y)-3x(5x+2y)=20x²-15xy-15x²-6xy=5x²-21xy
g.a(a+3b)+2a(4a+5b)=a²+3ab+8a²+10ab=9a²+13ab