Hold'em table

Button open with a playable suited-ish connector (89o) in 3-handed play; standard raise to apply pressure on the blinds.

QJo in the small blind facing a button open of 2.5bb; 3-betting to 800 is a standard play since calling out of position in a 3-handed game is weak and QJo is a reasonable 3-bet candidate against a wide button range.

T-J offsuit is a marginal hand facing aggressive preflop action from two opponents. Seat 1 raised to 250, seat 2 re-raised to 800 (indicating strength), and I would need to call 700 more with a hand that doesn't have strong winning potential in a 3-way pot. Folding preserves chips for better opportunities.

8d9s offsuit facing a big 3-bet to 800 is not worth continuing; fold and preserve chips.

T2 suited is a weak hand even on the button in 3-handed play; folding avoids marginal spots out of a 100bb stack.

T7o is a weak hand unsuited in the small blind facing a big blind who has already checked (implicitly). Folding minimizes losses against a superior position and stack situation.

6-7 offsuit is a weak hand with poor connectivity and limited winning potential. Folding preserves chips for better opportunities from the button position.

J7 offsuit is weak; facing a call with only SB invested heads-up vs BB, folding is better than calling with a poor hand.

Weak offsuit low cards (34o) on the button with a raise to face isn't worth continuing; folding preserves chips for better spots.

Button folded, so it's SB vs BB heads-up; T8o is a reasonable open-raise from the small blind in a blind-vs-blind spot, applying pressure with position disadvantage mitigated by fold equity.

A7o on the button in a 3-handed game is a standard open; raising to 2.5bb to take initiative against the blinds.

3-Js offsuit is a weak hand in the small blind facing a raise to 250. With only 200 chips to call and facing potential further aggression, folding preserves chips for better opportunities.

T2 offsuit is weak against a raise; folding to avoid investing further with a poor hand.

Q7o is a weak hand in early position on the button facing a big blind raise. This marginal holding plays poorly out of position and lacks the strength to justify calling the 100-chip bet when folding preserves chips for better opportunities.

Weak offsuit low cards (3c8c) heads-up to BB after button fold; not worth completing the small blind out of position.