deletions | additions       diff --git a/Ex 1.tex b/Ex 1.tex  index f9e01e2..3c36214 100644  --- a/Ex 1.tex  +++ b/Ex 1.tex 
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\iff & (x < 0 \to (0 \leq -x \a (0 \leq x \to -x = x) \a (x < 0 \to -x = -x )))\\  \land & (x \leq 0 \to (0 \leq x \a (0 \leq x \to x = x) \a (x < 0 \to x = -x)))\\  \iff & (x < 0 \to -x = -x) \a (0 \leq x \to x = x)\\  \iff & \T\\  Q \implies&  \T \end{split}  \end{equation}