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  1. * solve                                               internal
  2. solve(x^2=0, x)
  3. It solves a polynomial ordered up to 4.
  4.  
  5. solve([expr1=expr2,expr3=expr4], [x,y])
  6. It solves systems of linear equations.
  7. It gives all symbolic solutions.
  8. See also: nsolve.
  9. e.g. solve(x^2+5*x+6=0, x), solve([x+y=3, x-y=1], [x,y]).
  10.