Hello Subriamamis, 1- The Greeks did contribute a lot to the development of mathematics,yet they were not the first ones nor the last ones to contribute to it. Before them mathematics had its roots in ancient Egypt and Babylonia,it developed as well in China, southern India and Japan,then the Arabs contributed as well to it. Later some of this mathematics was translated into Latin and became the mathematics of Western Europe, yet the most significant development in mathematics took place in the ancient Greece, therefore many of the modern mathematical expressions today are highly dependent on Greek symbols. 2- The word TOEFL is actually an abbreviation for : "Test Of English as a Foreign Language" So it is only for English language!

when I was a student, it was a pleasure lesson to me, but now, I'm forget these "theoremes"