Question 772026
2x-3(5x^2+2x-6)-(2x^2+8x-1)
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= {{{2x- 15x^2 - 6x + 18-(2x^2+8x-1)}}}
= {{{2x- 15x^2 - 6x + 18 - 2x^2 - 8x + 1)}}}
= {{{-17x^2 - 12x + 19)}}}