January 2019 1 17 Report
A) (a-2b)(3a+b)-3(a-b)^2
b) (5a+1)^2+(5a-1)^2-(5a+1)(5a-1)-25a^2
c) (x+3y)(3y-x)-2(x-2)^2 +3(x^2-3x^2)

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