A = 7+ 3(2x-6)
A = 7+ 6x-12
A = 6x-5
B = 8x + (2x-2)(3x+1)
B = 8x + 6[tex]x^{2}[/tex]+2x-6x-2
B = 6[tex]x^{2}[/tex]+4x-1
C = (3x*5)(2-7x)
C = 15x(2-7x)
C = 30x - 105[tex]x^{2}[/tex]
D = 17 - (3-x)(4x-2)
D = 17 - (12x-6-4[tex]x^{2}[/tex]+2x)
D = 17 - 12x+6+4[tex]x^{2}[/tex]-2x
D = 4[tex]x^{2}[/tex]-14x+23
