Rút gọn: A=(x^2-x+1)(x^4-x^2+1)(x^8-x^4+1)(x^16-x-^8+1)(x^32-x^16+1)

Rút gọn:
A=(x^2-x+1)(x^4-x^2+1)(x^8-x^4+1)(x^16-x-^8+1)(x^32-x^16+1)