(math-integral-cache-state, calc-lang)

(math-integral-cache-state, calc-lang)
(calc-original-buffer): Declare them.

(calc-user-formula-alist): New variable.
(calc-user-define-formula, calc-fix-user-formula)
(calc-user-define-composition, calc-finish-formula-edit):
Replace variable alist by declared variable.

(var-q0, var-q1, var-q2, var-q3, var-q4, var-q5, var-q6)
(var-q7, var-q7, var-q8, var-q9): Declare them.
(calc-kbd-push): Don't check to see if var-q0 through var-q9
are bound.

(calcFunc-typeof): Replace undeclared variable by correct expression.

(math-exp-env): New variable.
(math-define-body, math-define-exp): Replace exp-env by declared
variable.

(math-define-exp): Replace misplaced variable by expression.