(3X-2)(X-3)-2(X+6)(X-5)+3(X^2-7X+13)
=3X^2-11X+6-2(X^2+X-30)+3X^2-21X+39
=4X^2-34X+105
X=3+1/2
4X^2-34X+105
=4*(7/2)^2-34*(7/2)+105
=35