y = (-4x² -2x +7) ¹⁰
y' = 10(-4x² -2x +7)⁹ * (-4x² -2x +7)' = 10(-4x² -2x +7)⁹ *(-8x -2)=
=(-80x -20)(-4x² -2x +7)⁹
y'(1) = (-80 -20)(-4 -2 +7)⁹= -100*1 = -100
