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# System prepended metadata

title: Untitled

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a) $(0 \cdot (0+1)^{*}) + ((0+1)^{*} \cdot 1)$
b) $(0+1)^{*} \cdot 0 0 0 \cdot (0+1)^{*}$
c) $0^* (10^+)^+$
d) $((01^+)+(1^+0))^+$

d Jonas) $(1^*(01 + 10 + 010)^+1^*)^+$