Equations created in Expressionist will not paste properly into MacDraw Pro 1.0v1. (Greek characters shifted up above the equal sign, etc.). The issue was also evident using MacDraw Pro 1.5.
Expressionist Tech Support confirms the following:
1) The current version of Expressionist as of May, 1992 is 2.07 (though updating probably wouldn't fix this issue).
2) They receive calls from MacDraw users of this issue
3) Suggested workaround (which sometimes helps): After pasting the equation into MacDraw Pro, Ungroup it several times. Then, move the characters into the proper position.