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Elements of the group are displayed as words in the presentation $\langle a, b, c, d \mid b^{2}=c^{4}=d^{84}=[a,b]=[b,c]=[b,d]=1, a^{2}=d^{42}, c^{a}=c^{3}, d^{a}=d^{55}, d^{c}=d^{29} \rangle$ .
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