symdiff is able to optimize and symbolically differentiate functions.

What's new:
	now includes two versions for computers with/without FPU

 PERMSSN    UID  GID    PACKED    SIZE  RATIO     CRC       STAMP          NAME
---------- ----------- ------- ------- ------ ---------- ------------ -------------
[generic]                 1115    2720  41.0% -lh5- b358 May  7  1996 symdiff.doc
[generic]                16409   29888  54.9% -lh5- 5a7c May  7  1996 symdiff_881
[generic]                21091   38176  55.2% -lh5- 0c36 May  7  1996 symdiff_no_fpu
---------- ----------- ------- ------- ------ ---------- ------------ -------------
 Total         3 files   38615   70784  54.6%            May  9  1996