(sin(2*x)+sin(6*x))*(cos(2*x)-cos(6*x))*1/(1-cos(8*x)) если x=-3 (упростите выражение)

$$frac{1}{- cos{left (8 x right )} + 1} left(sin{left (2 x right )} + sin{left (6 x right )}right) left(cos{left (2 x right )} – cos{left (6 x right )}right)$$

$$frac{1}{- cos{left (8 x right )} + 1} left(sin{left (2 x right )} + sin{left (6 x right )}right) left(cos{left (2 x right )} – cos{left (6 x right )}right)$$

((sin(2*(-3)) + sin(6*(-3)))*(cos(2*(-3)) – cos(6*(-3))))/(1 – cos(8*(-3)))

$$frac{1}{- cos{left (8 (-3) right )} + 1} left(sin{left (2 (-3) right )} + sin{left (6 (-3) right )}right) left(cos{left (2 (-3) right )} – cos{left (6 (-3) right )}right)$$

((sin(2*(-3)) + sin(6*(-3)))*(cos(2*(-3)) – cos(6*(-3))))/(1 – cos(8*(-3)))

$$frac{1}{- cos{left (-3 cdot 8 right )} + 1} left(sin{left (-3 cdot 2 right )} + sin{left (-3 cdot 6 right )}right) left(- cos{left (-3 cdot 6 right )} + cos{left (-3 cdot 2 right )}right)$$

(-cos(18) + cos(6))*(-sin(6) – sin(18))/(1 – cos(24))

$$frac{1}{- cos{left (24 right )} + 1} left(- sin{left (6 right )} – sin{left (18 right )}right) left(- cos{left (18 right )} + cos{left (6 right )}right)$$

(-cos(6*x) + cos(2*x))*(sin(2*x) + sin(6*x))/(1.0 – cos(8*x))

-(-cos(6*x) + cos(2*x))*(sin(2*x) + sin(6*x))
———————————————-
-1 + cos(8*x)

$$- frac{1}{cos{left (8 x right )} – 1} left(sin{left (2 x right )} + sin{left (6 x right )}right) left(cos{left (2 x right )} – cos{left (6 x right )}right)$$

$$- frac{3 sin{left (4 x right )}}{2 cos{left (8 x right )} – 2} + frac{sin{left (12 x right )}}{2 cos{left (8 x right )} – 2}$$

-(cos(2*x)*sin(2*x) + cos(2*x)*sin(6*x) – cos(6*x)*sin(2*x) – cos(6*x)*sin(6*x))
———————————————————————————
-1 + cos(8*x)

$$- frac{1}{cos{left (8 x right )} – 1} left(sin{left (2 x right )} cos{left (2 x right )} – sin{left (2 x right )} cos{left (6 x right )} + sin{left (6 x right )} cos{left (2 x right )} – sin{left (6 x right )} cos{left (6 x right )}right)$$

-(-cos(6*x) + cos(2*x))*(sin(2*x) + sin(6*x))
———————————————-
-1 + cos(8*x)

$$- frac{1}{cos{left (8 x right )} – 1} left(sin{left (2 x right )} + sin{left (6 x right )}right) left(cos{left (2 x right )} – cos{left (6 x right )}right)$$

/ 3 3 5 5 / 2 6 6 2 2 4 4 2
– 20*cos (x)*sin (x) + 2*cos(x)*sin(x) + 6*cos (x)*sin(x) + 6*sin (x)*cos(x)/*cos (x) + sin (x) – cos (x) – sin (x) – 15*cos (x)*sin (x) + 15*cos (x)*sin (x)/
—————————————————————————————————————————————————————-
8 8 4 4 2 6 6 2
1 – cos (x) – sin (x) – 70*cos (x)*sin (x) + 28*cos (x)*sin (x) + 28*cos (x)*sin (x)

$$frac{left(6 sin^{5}{left (x right )} cos{left (x right )} – 20 sin^{3}{left (x right )} cos^{3}{left (x right )} + 6 sin{left (x right )} cos^{5}{left (x right )} + 2 sin{left (x right )} cos{left (x right )}right) left(sin^{6}{left (x right )} – 15 sin^{4}{left (x right )} cos^{2}{left (x right )} + 15 sin^{2}{left (x right )} cos^{4}{left (x right )} – sin^{2}{left (x right )} – cos^{6}{left (x right )} + cos^{2}{left (x right )}right)}{- sin^{8}{left (x right )} + 28 sin^{6}{left (x right )} cos^{2}{left (x right )} – 70 sin^{4}{left (x right )} cos^{4}{left (x right )} + 28 sin^{2}{left (x right )} cos^{6}{left (x right )} – cos^{8}{left (x right )} + 1}$$