For example, to find the surface area of some general functional shape, say formula_2, we have
f ɔ ɹ WORD_BOUNDARY ɛ ɡ z æ m p ə l WORD_BOUNDARY t ə WORD_BOUNDARY f aɪ n d WORD_BOUNDARY ð ə WORD_BOUNDARY s ɜː f ɪ s WORD_BOUNDARY ɛ ɹ iə WORD_BOUNDARY ʌ v WORD_BOUNDARY s ʌ m WORD_BOUNDARY d̠ʒ ɛ n ə ɹ ɹ ə l WORD_BOUNDARY f ʌ ŋ k ʃ ə n ə l WORD_BOUNDARY ʃ eɪ p WORD_BOUNDARY s eɪ WORD_BOUNDARY f ɔ ɹ m j ʊ l ə WORD_BOUNDARY t uː WORD_BOUNDARY w iː WORD_BOUNDARY h æ v WORD_BOUNDARY