\directlua{tex.enableprimitives('',tex.extraprimitives())} \pdfoutput=1 \pagedir TRT \bodydir TRT \pardir TRT \textdir TRT \mathdir TRT \noindent % \parshape 1 4pc 6.5in Bla bla bla bla bla bla bla bla bla bla bla bla bla bla bla bla bla bla bla bla bla bla bla bla bla bla bla $$f(x)=\sum_{n=1}^\infty a_n\cos nx+b_n\sin nx\eqno(1)$$ Bla bla bla bla bla bla bla bla bla bla bla bla bla bla bla bla bla bla bla bla bla bla bla bla bla bla bla $$f(x)=\sum_{n=1}^\infty a_n\cos nx+b_n\sin nx\eqno\llap{(1)}$$ Bla bla bla bla bla bla bla bla bla bla bla bla bla bla bla bla bla bla bla bla bla bla bla bla bla bla bla $$f(x)=\sum_{n=1}^\infty a_n\cos nx+b_n\sin nx$$ Bla bla bla bla bla bla bla bla bla bla bla bla bla bla bla bla bla bla bla bla bla bla bla bla bla bla bla $$f(x)=\sum_{n=1}^\infty a_n\cos nx+b_n\sin nx\leqno(2)$$ Bla bla bla bla bla bla bla bla bla bla bla bla bla bla bla bla bla bla bla bla bla bla bla bla bla bla bla $$f(x)=\sum_{n=1}^\infty a_n\cos nx+b_n\sin nx\leqno\rlap{(2)}$$ Bla bla bla bla bla bla bla bla bla bla bla bla bla bla bla bla bla bla bla bla bla bla bla bla bla bla bla \vfil\break \noindent Bla bla bla bla bla bla bla bla bla bla bla bla bla bla bla bla bla bla bla bla bla bla bla bla bla bla bla bla bla $$f(x)=\sum_{n=1}^\infty a_n\cos nx+b_n\sin nx\eqno(1)$$ Bla bla bla bla bla bla bla bla bla bla bla bla bla bla bla bla bla bla bla bla bla bla bla bla bla bla bla bla bla $$f(x)=\sum_{n=1}^\infty a_n\cos nx+b_n\sin nx\eqno\llap{(1)}$$ Bla bla bla bla bla bla bla bla bla bla bla bla bla bla bla bla bla bla bla bla bla bla bla bla bla bla bla bla bla $$f(x)=\sum_{n=1}^\infty a_n\cos nx+b_n\sin nx$$ Bla bla bla bla bla bla bla bla bla bla bla bla bla bla bla bla bla bla bla bla bla bla bla bla bla bla bla bla bla $$f(x)=\sum_{n=1}^\infty a_n\cos nx+b_n\sin nx\leqno(2)$$ Bla bla bla bla bla bla bla bla bla bla bla bla bla bla bla bla bla bla bla bla bla bla bla bla bla bla bla bla bla $$f(x)=\sum_{n=1}^\infty a_n\cos nx+b_n\sin nx\leqno\rlap{(2)}$$ Bla bla bla bla bla bla bla bla bla bla bla bla bla bla bla bla bla bla bla bla bla bla bla bla bla bla bla bla bla \end