Answer:

x²+15x-6

Step-by-step explanation:

7x+4{x²÷(5x÷10)}-3{2-x³÷3x}

7x+4{x²÷x÷2}-3{2-x³÷3x

7x+4{x²×2÷x}-3{2-x³÷3x}

7x+8x-6+x²

x²+15x-6 Ans