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Selected answers:
Centralizers of pairs in monoids of selfmaps
When do two nondegenerate quadratic forms give rise to isomorphic Lie algebras?
A question about subsets of plane (or: how to apply the notion of commensurating action to a plane geometry question);
Finitely generated soluble groups with uncountably many maximal subgroups
Example of reflective subcategory of (Groups) whose reflector doesn't preserve finite products
divisors of $p^4+1$ of the form $kp+1$
Infinitely many finitely generated groups having the same Cayley graph
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 64 In a topological space if there exists a loop that cannot be contracted to a point does there exist a simple loop that cannot be contracted also?
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 38 Are infinite groups in which most elements have order $\leq 2$ commutative?
 35 Does GL_n(Z) have a noetherian group ring?
 35 divisors of $p^4+1$ of the form $kp+1$
 32 Second Betti number of lattices in $\mathrm{SL}_3(\mathbf{R})$
 32 Does there exists a group structure on $\circ$ on $(\mathbb{R},\circ)$ such that $(\mathbb{R},\circ)$ is nonisomorphic to $(\mathbb{R},+)$?
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