= 4(x-1)^2(x+1)(x+5) 10(x - 1) (x + 2) * (x^2 + 7x + 10) = 10(x-1)(x+2)(x+2)(x+5) then LCM = 20(x-1)^2(x+2)^2(x+1)(x+5)
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