R Markdown knitting issue

I am trying to knit a markdown to PDF and i am getting the below message. The text i am trying to knitt contains + - signs and ().

! Package inputenc Error: Unicode character − (U+2212)
(inputenc)                not set up for use with LaTeX.

I have found that the issue to do with copying and pasting text from word. I hope there was away of checking the spelling via R Studio. I am copying me text to a note bad then into R studio.

That functionality will be present on the next version of RStudio, you can try it by installing a daily build version, but be aware that those are not stable versions and might be bugui

https://dailies.rstudio.com/

That's good to know. Thanks for the info.