Here are some answers
Think about shoulder hits on the two extension stones, but for a central reduction, try 1. Black can answer at a or b depending on what he wants. The shimari is very strong, so white must be flexible and play lightly. Cross cuts and sacrifices. MoreVariousMoyos/Answers2?
White attaches because she doesn't mind making black stronger because the left side extension is close. The object is to mess up the top side. Black can answer at (least at) any of a-e, so be prepared with some suitable ideas for each one. MoreVariousMoyos/Answers3?
Similar to the Keima above. White at 1 is the central point. Black can answer at a or c. The attachment and crosscut at b is a good answer to a, but there is less chance to take the corner if black resists, so if the ladders don't work for white then c is better. Black c can be answered by d, since it threatens to make e work
If white has enough space to make a base at 2, if black defends the corner, then this 1 strikes at a weak spot. Note the nice forcing moves of 3 and 5, before jumping to 7.
The heavy handed approach is especially suitable when black is already strong. If black continues at b instead of a, 1 and 3 will be sacrificed. c and d are good shape points for white to continue.
Step very lightly and delicately. Know the tripod group in the corner. If black a, then b,c,3. If 4 on the outside, b is still good.
1 is the place with this extension. White can cope easily with an attachment to the left of 1, but 2 is the move to be careful with. Avoid the standard joseki sequence starting with white at 4 - the extension stone makes things a bit hot if black cuts at 3. White might also tenuki after 2.
The 33 point is better against this extension, because it avoids the attach at 33 sequence. If black 2, the sequence above leads to 9 nicely damaging the extension stone. Black a is answered with b,c,d, leaving the extension rather lose.
As long as you know shoulder hits, things are fine. In fact, since a and b are miai, it's not even too urgent.
The shoulder hit at a would give black perfect shape at b, so white gets the 1,2 exchange in. Once 2 is on the board, white can start operations with 3, confident that if she is forced to live small, (black c, then d,e,f,g) 2 will be too close to the influence. If Black plays f instead, White can exchange j for k, and then take a chance of a later ko in the corner with c. j and k will work nicely with m as well.