unexpected EOF while looking for matching ``' - bash

Question

I try to run this script to create simple, beautiful windows with bushcurses but there is an error
~/bashcurses$ ./myfirstwindow1.sh
./myfirstwindow1.sh: line 32: unexpected EOF while looking for matching ``'
./myfirstwindow1.sh: line 39: syntax error: unexpected end of file
I have tried to add or delete '" but cannot find proper solution. Can you please help me to identify the cause of the error?
script:
#!/bin/bash
. `dirname $0`/simple_curses.sh
main (){
window "`hostname`" "red"
append "`date`"
addsep
append_tabbed "Up since|`uptime | cut -f1 -d"," | sed 's/^ *//' | cut -f3- -d" "`" 2 "|"
append_tabbed "Users:`uptime | cut -f2 -d"," | sed 's/^ *//'| cut -f1 -d" "`" 2
append_tabbed "`awk '{print "Load average:" $1 " " $2 " " $3}' < /proc/loadavg`" 2
endwin
window "Memory usage" "red"
append_tabbed `cat /proc/meminfo | awk '/MemTotal/ {print "Total:" $2/1024}'` 2
append_tabbed `cat /proc/meminfo | awk '/MemFree/ {print "Used:" $2/1024}'` 2
endwin
window "Processus taking memory and CPU" "green"
for i in `seq 2 6`; do
append_tabbed "`ps ax -o pid,rss,pcpu,ucmd --sort=-cpu,-rss | sed -n "$i,$i p" | awk '{printf "%s: %smo: %s%%" , $4, $2/1024, $3 }'`" 3
done
endwin
window "Last kernel messages" "blue"
dmesg | tail -n 10 > /tmp/deskbar.dmesg
while read line; do
append_tabbed "$line" 1 "~"
done < /tmp/deskbar.dmesg
rm -f /tmp/deskbar.dmesg
endwin
window "Inet interfaces" "grey"
ERROR >> _ifaces=$(for inet in `ifconfig | cut -f1 -d " " | sed -n "/./ p"`; do ifconfig $inet | awk 'BEGIN{printf "%s", "'"$inet"'"} /adr:/ {printf ":%s\n", $2}'|sed 's/adr://'; done)
for ifac in $_ifaces; do
append_tabbed "$ifac" 2
done
endwin
}
main_loop 1