Calculate $3+4-\left(-\frac{4}{5}\right)$3+4−(−45).

Evaluate $\frac{-2}{5}\times\frac{4}{5}+\frac{2}{25}$−25×45+225, writing your answer in its simplest form.

Evaluate $\frac{-3}{5}\times\frac{4}{5}+\frac{-1}{25}$−35×45+−125, writing your answer in its simplest form.

Evaluate $\frac{2}{5}\times\frac{-4}{3}-\frac{3}{15}$25×−43−315, writing your answer in its simplest form.