To solve this problem, let's solve it by step by step.
Step 1: Layout equation.
9(6^2)−9(2^2)+4+5
Step 2: Solve 6^2.
=(9)(36)−9(22)+4+5
=324−9(22)+4+5
Step 3: Solve 2^2.
=324−(9)(4)+4+5
=324−36+4+5
Step 4: Subtract 36 from 324.
=288+4+5
Step 5: Add 4+5.
=288+9
Step 6: Answer.
=297
So the answer is 297.
