úÎ ý Î Safe-Infered# is the default list of operators. BAn operator consists of one character and a function with of type  CReal -> CReal -> CReal.  includes:  addition, represented by '+'  subtraction, represented by '-'  multiplication, represented by 'c'  division, represented by '/'  exponentiation, represented by '^' B logarithming (with flipped arguments, see below), represented by '?' such that these laws are held:  (a - b == c) == (a == b + c)  (a / b == c) == (a == b * c)  (a ? b == c) == (a == b ^ c) A gets a list of operators and a string containing a mathematical  expression/9term which only uses those operators listed in the first 0 argument, and returns the result of that term.  is the default evaluator:  hascal = eval operators  hascal-1.1Hascal operatorsevalhascal