Which student wrote an expression equivalent to 6x + 4x to the third power? choose all that apply. a: anne wrote (6 + x) + (4 + x to the third power). b: bart wrote 6x (1 + 2/3x to the second power). c: cassie wrote 3x + 3x + 2x to the third power + 2x to the third power. d: david wrote x(6 + 4x to the second power). e: edgar wrote 10 + x to the fourth power