Step 1. Use the Multiplication Distributive Property
So, -2n^6y^5 * -6n^3y^2n^3y^3
Step 2. Take out the constants
-(2 * -6)n^6n^3n^3y^5y^2y^3
Step 3. Simplify 2 * -6 to -12
-(-12)n^6n^3n^3y^5y^2y^3
Step 4. Regroup terms
-(-12n^6n^3n^3y^5y^2y^3)
Step 5. Use Product Rule
-(-12n^6 + 3 + 3 y^5 + 2 + 3)
Step 6. Simplify 5 + 2 + 3 to 10
-(-12n^12y^10)
Step 8. Simplify brackets
12n^12y^10