Hold'em table

Holding 4s2c on the button is too weak to open raise or call, making a fold the clear +EV decision.

2d6s offsuit is one of the worst hands in the deck; calling 1BB multiway or bluff-raising into two live blinds has negative expectation, so folding for just 1.5BB in the pot is clearly best.

85 offsuit is too weak to complete from the small blind out of position against the big blind.

Pocket queens is a premium hand on the button, so I open-raise to 3x to build the pot and take control preflop.

Holding premium AKo in the small blind against a button open, standard play is to 3-bet for value and to take initiative out of position.

Holding 62o, nearly the worst hand in poker, I face a 3-bet to 1100 and would need to call 1000 more with no position, no equity, and no fold equity. Folding is clearly the maximum-EV play.

Pocket queens are well ahead of a small-blind three-bet range in a three-handed pot, and I have position. A four-bet to 2800 builds the pot for value while still leaving room to play postflop.

Holding AKo in a 3-handed battle against the button's 4-bet, shoving all-in maximizes fold equity and realizes our equity cleanly without playing out of position on an awkward SPR postflop.

Pocket queens have enough equity against a plausible jam range (AA/KK/AK and wider) to call 72bb into a pot that only needs about 36% equity.

74s is too weak to open profitably from the button even in a 3-handed game.

5s2c is one of the worst hands in hold'em, and I'd be out of position against the big blind for another 50 chips. Folding and preserving my stack is clearly the best play.

K2 offsuit is one of the weakest hands even from the button 3-handed: it's dominated by any king and can't make a straight using both cards. Folding and waiting for a better spot is the highest-EV play.

95o is too weak to complete from the small blind even heads-up against the big blind, so folding saves the extra half-blind.

Q3 offsuit is too weak to open even from the button in a three-handed game, so I fold rather than invest chips with a dominated, poorly coordinated hand.

82o is one of the weakest starting hands in poker, making it an easy fold from the small blind even blind versus blind.