Question 57448
#65 1/2(x+3)+1/3(3x+6)
=(1/2)x+(3/2)+x+2
=(3/2)x+(7/2)
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#67 (12x/5)(5/12)+(-6x)(-1/6)
  =x+x
  =2x
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#69 -8/8(7x^2/8)+1/3(3x^2)+(3x^2/4)(4/3)
= -(7/8)x^2 +x^2 + x^2
= (9/8)x^2
Cheers,
Stan H.