Factorize-

abc + ab + bc + ca + a + b + c + 1

Factorise:abc+ab+bc+ca+a+b+c+1Hence  rearranging and taking commonsab(c+1)+c(b+a)+(a+b)+(c+1)={ab(c+1)+(c+1)}+{c(b+a)+(a+b)}=(c+1)(ab+1)+(b+a)(c+1)=(c+1){ab+1+b+a} Ans

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