What is the answer to this question?

Rename mixed numbers before you can subtract are what

Pick the expression that matches this description: a polynomial of the 5th degree with a leading coefficient of 7 and a constant term of 6 (choice a) 7x^5+2x^2+6 (choice b) 7x^6−6x^4+5 (choice c) 6x^7−x^5+5 (choice d) 6x^5+x^4+7

Which function is odd check all that apply a. y=sin x b. y=csc x c. y=cot x d. y=sec x