title: How can I recognize text with little math symbols by tesseract OCR?
body: <p>My text with some not such complex math symbols as below.</p>
  
  <p><a href="https://i.stack.imgur.com/jzi41.png" rel="noreferrer"><img src="https://i.stack.imgur.com/jzi41.png" alt="enter image description here"></a></p>
  
  <p><a href="https://i.stack.imgur.com/Krht9.png" rel="noreferrer"><img src="https://i.stack.imgur.com/Krht9.png" alt="enter image description here"></a></p>
  
  <p>Tesseract OCR default cannot recognize such math symbols (+-, angle). How can I recognize such math symbols by tesseract ?</p>