д) \((3\frac{3}{4})^2 + 3\frac{3}{4}\)

Решение:

( \(3\frac{3}{4}\)^2 + 3\(\frac{3}{4}\) = \(\frac{15}{4}\)^2 + \(\frac{15}{4}\) = \(\frac{225}{16}\) + \(\frac{15}{4}\) = \(\frac{225}{16}\) + \(\frac{60}{16}\) = \(\frac{285}{16}\) = 17\(\frac{13}{16}\)\)

Ответ: \(17\frac{13}{16}\\)