Thursday Morning Riddle

I’m addition, subtraction; I’m Not, But, and And;
I’m a surgical process that’s carefully planned;
I’m an action covert with a central command;
And a game where it helps to be steady of hand.

Who am I?

UPDATE: Riddle solved by Bronx Richie. See comments for answer.

3 Responses to “Thursday Morning Riddle”

  1. Bronx Richie Says:

    operation

  2. Bill Says:

    OPERATION is correct. Way to go, Bronx Richie!

  3. Dharam Says:

    I’m addition, subtraction; I’m Not, But, and And;
    I’m a surgical process that’s carefully planned;
    I’m an action covert with a central command;
    And a game where it helps to be steady of hand.

    Who am I?
    =

    Simpleminded Bush, in a math calculation,
    Miscalculated the dangers in a combat OPERATION,
    Did staunch men drawn by co-OPERATION,
    (for what?)
    Actively thwart Armageddon’s manifestation?

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