deletions | additions       diff --git a/Ex 1.tex b/Ex 1.tex  index 2bc29f9..5e2abfd 100644  --- a/Ex 1.tex  +++ b/Ex 1.tex 
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\begin{subequations}  \begin[align}  Q &= \varnothing\\  R &= 0 \leq y \land (0 \leq x \to y = x) \land (x < 0 \to y = -x)  \end[align}  \end{subequations}