Let's simplify the expression step by step:
Given:
\[ \frac{3}{5}r + 2r^2 - \frac{3}{5}r - 2r^2 + 3r \]
- Combine like terms for \( \frac{3}{5}r \) and \( -\frac{3}{5}r \):
\[ \frac{3}{5}r - \frac{3}{5}r = 0 \]
- Combine \( 2r^2 \) and \( -2r^2 \):
\[ 2r^2 - 2r^2 = 0 \]
- Now we are left with just \( 3r \):
\[ 3r \]
So, the entire expression simplifies to:
\[ 3r \]
Thus, the final answer is:
\[ 3r \]