All right a quick one to download and extract a .tar.gz archive in the current directory:
dluntar() { tar zxv < <(wget -q -O - $1) }
# usage
$ dluntar http://my.domain.com/archive.tar.gz
Oh, and I love Docker to test things:
sandbox() { docker run --rm -i -t deviantony/sandbox /bin/zsh }
Replace with your image ;)