Enter the expression −2c⃗ 6d⃗ −2c→ 6d→ in the answer box using the notation just described. Express your answer in terms of c⃗ c→c vec and d⃗ d→d vec. Use the button under the menu in the answer box to create vectors. −2c⃗ 6d⃗ −2c→ 6d→