title: Case Statements with multiple expression or conditions
body: <p>I want to write a case statement with multiple expression like such:</p>
  
  <pre><code>a=1
  b=0
  c=1
  d=0
  case ${a}+${b}+${c}+${d} in
      *_1|1_*|*_1|*_1)
              echo "it's 1,1,1,1";;
      *_1|*_1|*_1|*_0)
              echo "it's 1,1,1,0";;
      *_1|0_*|1_*|0_*)
              echo "it's 1,0,1,0";;
  esac
  </code></pre>
  
  <p>But this doesn't print what I was expecting.</p>