Which expression is equivalent to 7 A cubed open paren 6 A squared plus A close paren squared minus 4 A to the 6th power ?
A
252 A to the 7th power plus 80 A to the 6th power plus 7 A to the 5th powerB
252 A to the 7th power plus 84 A to the 6th power plus 7 A to the 5th powerC
252 A to the 7th power minus 4 A to the 6th power plus 7 A to the 5th powerD
252 A to the 7th power minus 4 A to the 6th power plus A squared