Please help with these questions

1. write all the terms in the given algebraic expression

a. 2x^2-7

b.3x^2 + y^2 - 3xy + 9



2. Is -2(x+3)-3x-7 equivalent to -(5x+13)? show every step of your work



3. solve for y

-3(3y-7)-7y-3=10



4. solve 3/8k < -5/4 for k



5. 36 is 2 times the difference of two less than a number