Hold'em table

On the button three-handed, an ace gives me decent fold equity against the blinds; a standard 3x open lets me take the pot cheaply or play position postflop.

Pocket nines are ahead of a button open and play poorly as a flat from the small blind, so I 3-bet to about 10bb for value and fold equity.

7-10 offsuit facing a raise and a 3-bet to 1000 is too weak to continue profitably.

A2o is far too weak to continue against a 10bb three-bet from the small blind; I'd need ~33% equity to call 700 into 1400 and A2o doesn't have it against a strong range.

45o is too weak to open even from the button in three-handed play; folding avoids a marginal spot with poor postflop playability.

J6o offsuit is a weak hand not worth completing from the small blind against a big blind who can check behind.

A7 offsuit on the button is a reasonable raising hand heads-up-ish; a standard raise builds the pot and applies pressure while keeping the size manageable.

5s3s is far too weak to call a 2.5x raise out of position against two players, and 3-betting this hand would just build a pot with the worst hand.

K3 offsuit is too weak to defend the big blind against a button open, especially out of position. Folding avoids a dominated, poorly playable hand.

42 offsuit on the button is the bottom of any opening range; calling 100 into a 150 pot with no equity or fold equity justification is -EV, so I fold and wait for a better spot.

Button folded, so this is heads-up versus the big blind. Suited 75 has enough playability to take the initiative with a small raise rather than limp.

64o is a weak hand facing a raise; not worth calling out of position.

KJo is a clear open from the button in three-handed play, and a 2.5bb raise applies pressure while keeping the pot manageable.

3-4 offsuit facing a raise is weak; not worth defending from the small blind out of position.

In 3-max the button opens very wide, so defending my big blind with 87o for just 150 more is profitable, and I keep the pot small out of position.

My 8-7 only plays the board pair of nines with a weak kicker against the preflop raiser, who likely holds overcards that beat me at showdown. Checking keeps the pot small and avoids bluffing into their continuing range.

As the preflop raiser I continuation-bet a dry paired flop after the big blind checks. King-jack has two overcards and some fold equity, so a small bet is better than giving a free card.

My 8-7 only plays the board's pair of nines with a weak 8 kicker and I have no real draws, so nearly any ace, king, or pocket pair from the preflop raiser beats me. Calling the small c-bet with near-zero equity is -EV, so I fold cheaply.

AJs-quality hand (A-J offsuit) on the button, standard 3bb raise to build pot and take initiative.

A6o out of position against a button raise with the big blind still to act is too weak to defend profitably; folding avoids a dominated, hard-to-play spot.

QTo has enough equity versus a button open to call 200 into 450 heads-up; a 3-bet out of position is unnecessary.

Queen-high with no pair or draw on an ace-high flop has little value, so I check to the preflop raiser rather than bluff into a likely stronger range.

I hold top pair with a strong kicker on a dry-ish board; betting for value against a checking opponent.

Queen-ten high has no pair and no draw on an ace-high flop, so calling a 400 flop bet is unprofitable.