Irule error

You have a number of syntax errors, I assume you want the information in one header, if so, please try this iRule

when HTTP_RESPONSE {
    if {!([HTTP::header exists "Public-Key-Pins-Report-Only"])} { 
        HTTP::header insert "Public-Key-Pins-Report-Only" "aaaaasdsdsdsdsdsdsdsadsdsdsd\"; pin-sha256=\"sdsdsdsdsdssdsdsdsdsd=\"; pin-sha256=\"sdsdsdssadsadsadsasadsadsadsadsad\"; max-age=5184000; includeSubDomains;" 
    }
}