(x-2)(x-3)+2(x+6)(x-5)-3(x^2-7x+13)
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(x-2)(x-3)+2(x+6)(x-5)-3(x^2-7x+13)(x-2)(x-3)+2(x+6)(x-5)-3(x^2-7x+13)(x-2)(x-3)+2(x+6)(x-5)-3(x^2-7
(x-2)(x-3)+2(x+6)(x-5)-3(x^2-7x+13)
(x-2)(x-3)+2(x+6)(x-5)-3(x^2-7x+13)
(x-2)(x-3)+2(x+6)(x-5)-3(x^2-7x+13)
=x²-5x+6+2(x²+x-30)-3(x²-7x+13)
=x²-5x+6+2x²+2x-60-3x²+21x-39
=18x-93
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