Expanding Cubics

Question 1:

x+1x+5x+5
x3+11x2+35x+25

Question 2:

x+3x+4x+2
x3+9x2+26x+24

Question 3:

x+5x2x+3
x3+6x2x30

Question 4:

x1x3x5
x39x2+23x15