Disable LESS-CSS Overwriting calc()

Question

This question already has answers here:

Answer 1

Using an escaped string (a.k.a. escaped value):

width: ~"calc(100% - 200px)";

---

Also, in case you need to mix Less math with escaped strings:

width: calc(~"100% - 15rem +" (10px+5px) ~"+ 2em");

Compiles to:

width: calc(100% - 15rem + 15px + 2em);

This works as Less concatenates values (the escaped strings and math result) with a space by default.