FactorSquareFree[poly] pulls out any multiple factors in a polynomial.
FullSimplify[expr] tries a wide range of transformations on expr involving elementary and special functions, and returns the simplest form it finds. FullSimplify[expr, assum] ...
HurwitzLerchPhi[z, s, a] gives the Hurwitz\[Dash]Lerch transcendent \[CapitalPhi](z, s, a).
HurwitzZeta[s, a] gives the Hurwitz zeta function \[Zeta](s, a).
IdentityMatrix[n] gives the n*n identity matrix.
LeafCount[expr] gives the total number of indivisible subexpressions in expr.
LineGraph[g] gives the line graph of the graph g.
LogBarnesG[z] gives the logarithm of the Barnes G-function logG(z).
MaxExtraConditions is an option to Solve and related functions that specifies how many extra equational conditions on continuous parameters to allow in solutions that are ...
NHoldAll is an attribute which specifies that none of the arguments to a function should be affected by N.