Choose Which of the following shows 8x3y x2 − 14z − 2 5y2x written in standard form? −14z 8x3y 5y2x − 2 x2 8x3y 5y2x x2 − 14z − 2 8x3y x2 5y2x − 14z − 2 x2 − 2 − 14z 5y2x 8x2ythe expression that represents a cubic expression. 19x4 18x3 − 16x2 − 12x 1 10x3 − 6x2 − 9x 12 −9x2 − 3x 4 4x 3