htaccess regex?

Question

htaccess

Hello everyone. Help htacess, he himself is not very strong
there is a picture of my path/121212_12121.???x???.jpg|png
where the questions will be numbers, such as the size of the picture, they must be removed to get
my path/121212_12121. jpg|png

Answer 1

(.+)\.[0-9]{1,}x[0-9]{1,}\.(jpg|png)
(.+)- any characters from 1
\.- dot character
[0-9]{1,}- numbers from 0 to 9, from one time
(jpg|png)- or or