11) 3 · (−4)⁻² + 5⁻¹

\(3\cdot(-4)^{-2}+5^{-1}=3\cdot\frac{1}{16}+\frac{1}{5}=\frac{3}{16}+\frac{1}{5}\).

\(\frac{3}{16}+\frac{1}{5}=\frac{15}{80}+\frac{16}{80}=\frac{31}{80}\).

Ответ: \(\frac{31}{80}\).