Mathematics Test—No Calculator

over . t, close parenthesis, minus t. open parenthesis, the fraction . s. over . t, close parenthesis, equals the fraction . s squared over t, end fraction minus s. Choices A, B, and D are incorrect. In each of these choices, at least one of the products in the expansion is not correct. For example , s. open parenthesis, the fraction . s. over . t ................
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