wˌɛɹ ðə dˌɛfɪnˈɪʃən əvə lˈaɪn ˈɪntᵻɡɹəl ɪz jˈuːzd ɪnðə fˈɜːst iːkwˈɔlᵻɾi, ðɪ əbˌʌv ᵻkwˈeɪʒən ɪz jˈuːzd ɪnðə sˈɛkənd iːkwˈɔlᵻɾi, ænd ðə sˈɛkənd fˌʌndəmˈɛntəl θˈiəɹəm ʌv kˈælkjʊləs ɪz jˈuːzd ɪnðə θˈɜːd iːkwˈɔlᵻɾi.
where the definition of a line integral is used in the first equality, the above equation is used in the second equality, and the second fundamental theorem of calculus is used in the third equality.