# Struggling with simplifying Boolean expression

#### plany94

A!B!CD! + A!BCD + AB!C!D + AB!CD + ABC!D!

Can anyone help me? Thank you

#### romsek

Math Team
are you writing, for example, "NOT A" as A! ?

standard notation is !A

#### Joppy

standard notation is !A
Really? I thought $\bar{A}$ is more common outside of $\neg$

#### Greens

I've even seen ~$A$.

#### Joppy

Yeah.. itâ€™s unimportant, was just dredging up memories from my embedded micro controllers class.

#### romsek

Math Team
Really? I thought $\bar{A}$ is more common outside of $\neg$
I meant w/regard as to which side of the variable the negation symbol falls.

Yes I've seen $\neg$ and ~ used as well but always on the left side of the variable.

#### plany94

A! is NOT A. My notation isnâ€™t great haha

Can anyone help me simplify the expression at all

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