Please help simplify the Boolean algebra formula (non-A + non-B + non-C) (a + B + C) Thank you first! I'm a freshman in senior high school. I don't understand terms

Let's expand it first. The result is (not non XOR, * stands for and) nota * a + notb * B + notc * C + nota * B + notb * a + notb * C + notc * B + notc * a + nota * C, where nota * a = fnota * B + notb * a = XOR (a, b). As for why, Baidu can simplify it very clearly

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