Extract only certain part of text from a cell

Formula:

=LEFT(SUBSTITUTE(SUBSTITUTE(IF(ISNUMBER(SEARCH("//",A1)),MID(A1,SEARCH("//",A1)+2,255),A1),"www.",""),"ww.",""),FIND("/",SUBSTITUTE(SUBSTITUTE(IF(ISNUMBER(SEARCH("//",A1)),MID(A1,SEARCH("//",A1)+2,255),A1),"www.",""),"ww.",""))-1)