#### 7.2.4.4 poly related functions (plural)

`bracket`
  computes the (iterated) Lie bracket of two polynomials (see bracket)
`lead`
  leading term (see lead)
`leadcoef`
  coefficient of the leading term (see leadcoef)
`leadexp`
  the exponent vector of the leading monomial (see leadexp)
`leadmonom`
  leading monomial (see leadmonom)
`oppose`
  creates an opposite polynomial of a given polynomial from the given ring into a basering (see oppose)
`reduce`
  left normal form with respect to a left Groebner basis (see reduce (plural))
`simplify`
  normalize a polynomial (see simplify)
`size`
  number of monomials (see size)
`subst`
  substitute a ring variable (see subst (plural))
`var`
  the indicated variable of the ring (see var)

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