(calc-do-quick-calc): Use kill-new to append string to kill-ring.

(calc-do-quick-calc):  Use kill-new to append string to kill-ring.

(calc-alg-exp, math-toks, math-exp-pos,math-exp-old-pos)
(math-exp-token, math-exp-keep-spaces, math-exp-str):  New variables.

(calc-do-alg-entry, calcAlg-equals, calcAlg-edit, calcAlg-enter):  Use
declared variable calc-alg-exp.

(math-build-parse-table, math-find-user-token):  Use declared variable
math-toks.

(math-read-exprs, math-read-token, calc-check-user-syntax,
calc-match-user-syntax, match-factor-after, math-read-factor):  Use
declared variables math-exp-pos math-exp-old-pos.

(math-read-exprs, math-read-token, math-read-expr-level)
(calc-check-user-syntax, calc-match-user-syntax, match-factor-after)
(math-read-factor):  Use declared variable math-exp-token.

(math-read-exprs, math-read-expr-list, math-read-token,
math-read-factor):  Use declared variable math-exp-keep-spaces.

(math-read-exprs, math-read-token):  Use declared variable
math-exp-str.

(calc-match-user-syntax):  Made m a local variable.