How to factor this algebraic identity used in Lagrange's theorem for polynomial congruences
9846
Prove $n-m \mid n^r - m^r\,$ [Factor Theorem, monomial case]
41673
Solve congruence system $\ x\equiv m_i-1 \pmod{m_i}\,$ for $\,i = 1,\ldots, k$
142666
Algebric proof for the identity $n(n-1)2^{n-2}=\sum_{k=1}^n {k(k-1) {n \choose k}}$
10548
The equation $-1 = x^2 + y^2$ in finite fields
56446
A kind of converse of Lagrange's Theorem
130825
How to factor intricate polynomial $ ab^3 - a^3b + a^3c -ac^3 +bc^3 - b^3c $
121404
How to factor polynomials in $\mathbb{Z}_n$?
9422
Computing the Galois group of polynomials $x^n-a \in \mathbb{Q}[x]$
49294
prove that $\operatorname{lcm}(n,m) = nm/\gcd(n,m)$
92518
mod Distributive Law, factoring $\!\!\bmod\!\!:$ $\ ab\bmod ac = a(b\bmod c)$
155012
Solving quadratic equations in modular arithmetic
113230
How can we factor $ q^4 + q^2 + 1$
139474
Solving system of Congruences with Two Variables (x and y)
131941
Solve quadratic congruences.
146053
Proving identities (mod $pq$) using Fermat's little theorem?
26478
Show that the congruence $x^{p-1} \equiv 1 \pmod {p^2}$ has precisely $p-1$ solutions modulo $p^2$
99502
Question on the coefficients of $(1+x+x^2+x^3+x^4)^{496}$