(9 points) 4. In each of the following exercises, rewrite and simplify the given expression. Give your answer using positive exponents only. 5x3 Z2 731'2 xy Z b. (uvzw3 3u2w)2(v'2) c. (J; + x2y_22)(xyzz3) (9 points) 5. In each of the following exercises, expand and simplify. a. (3xx2+1)J(14x)3 b. (tu)2 +5(3tu+4u2)(1+u) c. (l3x+x2)3(22x2) (9 points) 6. In each of the following exercises, factor the given expressions. a. 2y3+6y2+y+3 b. 3x218xy+24y2 c. 50x3 + 20;:2 + 2x