Here play the 15 with your index finger, hammer on the 18 with your pinky, bar 17 with your ring finger, release that bar as you pla the 16 with your middle finger, fifteen once again with the first finger, twenty with the pinky and then back down.

-----------------15-20-15-----------------------|
--------------16----------16--------------------|
-----------17----------------17-----------------|
--------17----------------------17--------------|
--15-18----------------------------18-15-------|
------------------------------------------------|
and

Same pattern.

-----------------14-19-|
--------------15-------|
-----------16----------|
-------16--------------|
-14 17-----------------|
-----------------------|

and much more complicated

Bar the 7th fret here with your index finger, and play the 10 with your pinky. Next bar the 6th fret and play the nine with your pinky (the 7th fret you'll want to use your middle finger to fret there). Do that for the rest of the tab here. Barring the lowest note and using your middle finger to play any notes not on that fret (except the highest note, which you play with your pinky).

--10-7-------7-10-7-------7-9-6-------6-9-6-------6-|
-------7---7--------7---7-------7---7-------7---7---|
---------7------------7-----------6-----------6-----|
----------------------------------------------------|
----------------------------------------------------|
----------------------------------------------------|

--10-7-------7-10-7-------7-12-9---------9-12-9---------9-|
-------7---7--------7---7--------10---10--------10---10---|
---------7------------7-------------9--------------9------|
----------------------------------------------------------|
----------------------------------------------------------|
----------------------------------------------------------|

--14-10----------10-14-10----------10-12-9---------9-12-9---------9-|
--------10----10----------10----10---------10---10--------10---10---|
-----------11----------------11---------------9--------------9------|
--------------------------------------------------------------------|
--------------------------------------------------------------------|
--------------------------------------------------------------------|


--14-10----------10-14-10----------10-16-13----------13-16----|
--------10----10----------10----10----------15----15----------|
-----------11----------------11----------------16-------------|
--------------------------------------------------------------|
--------------------------------------------------------------|
--------------------------------------------------------------|


|--12--8-----------------8--10--12-------------8--10--12||
|---------10-----10--12------------10---10-12-----------||
|-------------9------------------------9------------------||
|---------------------------------------------------------||
|---------------------------------------------------------||
|---------------------------------------------------------||