September 2018 1 18 Report

a) 7x^{2}-4x-6x^{2}+4-x^{2}+5x=

b)-2(3a-2b)-4a(2-3a+2b)=

c)(4-x)(2x+5)-4=

d) (4-2x)(3x-x)-2x(3x+1)


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