Подстановка условия
[src](4*a^2 - 9)*(1/(2*a - 3) - 1/(2*a + 3)) при a = 1/3
(4*a^2 - 9)*(1/(2*a - 3) - 1/(2*a + 3))
(4a2−9)(−2a+31+2a−31) (4*(1/3)^2 - 9)*(1/(2*(1/3) - 3) - 1/(2*(1/3) + 3))
(4(1/3)2−9)(−2(1/3)+31+2(1/3)−31) (4*(1/3)^2 - 9)*(1/(2/3 - 3) - 1/(2/3 + 3))
(−9+94)(−3+321−32+31)