Verbal substitution is realized through an auxiliary verb (do, be, have), sometimes together with another substitute term such as so or the same. Example (134) shows the substitution of looks pretty good in the first clause
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Substitution Method
Well, the key is to find the outside function and the inside function, where the outside function is the derivative of the inside function! Then we will make a suitable substitution that will simplify our integrand so that we can integrate, as illustrated in three easy steps below:
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