Thực hiện phép tính: d) ( 7^ 5 + 7^ 9 ) ⋅ ( 5^ 4 + 5^ 6 ) ⋅ ( 3^ 3 ⋅ 3 − 9^ 2 ) .

d) \[\left( {{7^5} + {7^9}} \right) \cdot \left( {{5^4} + {5^6}} \right) \cdot \left( {{3^3} \cdot 3 - {9^2}} \right)\]

\( = \left( {{7^5} + {7^9}} \right) \cdot \left( {{5^4} + {5^6}} \right) \cdot \left( {81 - 81} \right)\)

\( = \left( {{7^5} + {7^9}} \right) \cdot \left( {{5^4} + {5^6}} \right) \cdot 0\)

\( = 0\).