16 questions on algebra

SOLVE THE FOLLOWING :

a.  (2x^2 - 6x + 7) + (3x^3 - 3x)

b. (9x^3 - x^2 - x - 1/3) + (x^3 + x^2 + x + 4/3)

c. (3/7 x^3 - 1/5 x - 1/3) - (-2/7 x^3 + 1/4 x - 1/3)

d. (2^3)^5 

e. (x^6)^4

f. 3x^2(4x^3 - 5x + 2)

g.  (x - 1/3)(3x^3 - 6x^2 + 5x - 9)

h. (x + 4)(x + 6) 

i. (2x + 1/2)(2x - 1/2)

j. (x + 2)^2 

k. (x/4)^2

l. (10x^5 + 15x^6)/5x^3

m. (x^2 + 10x + 21) / (x + 3)

n. (7x - 9 - 4x^2 + 4x^3) / (2x - 1)

o. (8x^3 - 1) / (2x - 1) 

p. (6x^4 + 5x^3 + 3x - 5) / (3x^2 - 2x)