Step-by-step explanation:
To simplify the given expression, start by performing the multiplication and division separately, then subtract the second product:
\[ \frac{3}{51^2} \cdot m^2 \cdot n^3 \cdot \frac{15}{27} \cdot l \cdot m^3 \cdot n^4 - \left( \frac{2}{5} \cdot m^2 \cdot \ln^6 \cdot \frac{10}{3} \cdot n \cdot l^2 \cdot m^3 \right) \]
Combine the terms by multiplying the coefficients and adding the exponents, then simplify further if possible.
