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Simplifications.

  Two kinds of simplifications are provided: rational simplification (EXPA) and transcental simplification (TSIMP). Transcental simplification is used to detect relations between exponentials and logarithms. Since trigonometric functions are complex exponentials, they are simplified by TSIMP too. In addition ALGB operations perform automatic rational simplifications (in user mode).

The TSIMP output is affected by the state of the flag 13: if cleared, then complex logarithms and exponentials are converted in arctan and sin/cos functions.