No, but you can use a text input and evaluate the operation with Ryacas - see [here](https://stackoverflow.com/questions/61033227/in-shiny-how-to-insert-math-symbols-in-a-text-input-so-that-my-r-code-performs/61060509#61060509)
– Stéphane LaurentApr 24 '20 at 14:53