I want to use parentheses in coordinate calculation in tikz. There should be a simple way, but I couldn't find it. For example,
\def\x{10};
\draw (0,0) -- (1+1/\x,0);
this works fine. But,
\def\x{10};
\draw (0,0) -- (1+1/{\x+1},0);
this doesn't work. Other parentheses didn't work either. What is the expression for parentheses?