Calculate $3+4-\left(-\frac{4}{5}\right)$3+4−(−45).
Evaluate $\frac{-2}{5}\cdot\frac{4}{5}+\frac{2}{25}$−25·45+225, writing your answer in its simplest form.
Evaluate $\frac{-3}{5}\cdot\frac{4}{5}+\frac{-1}{25}$−35·45+−125, writing your answer in its simplest form.
Evaluate $\frac{2}{5}\cdot\frac{-4}{3}-\frac{3}{15}$25·−43−315, writing your answer in its simplest form.