Tính giá trị biểu thức sau
----- Nội dung ảnh -----
n/ \(\frac{6-x}{x^2+3x} + \frac{3}{2x+6}\)
p/ \(\frac{3}{2y+4} + \frac{1}{3y+6}\)
o/ \(\frac{1}{xy-x^2} \frac{1}{y^2-xy}\)
t/ \(\frac{x+1}{x+4} \frac{x^2-4}{x^2-16}\)
v/ \(\frac{-3x}{2x} + \frac{3x-2}{2x-4x^2}\)
w/ \(\frac{2x-2}{15} + \frac{3+2y}{6x^2y} + \frac{2x-5}{6x^3y}\)
y/ \(\frac{x^2}{x+y} + \frac{y^2}{x+y+z} - \frac{y^2}{x+y} - \frac{z^2}{y+z};\)
J/ \(A = \frac{20x^2 + 120x + 180}{(3x+5)^2 - 4x^2} + \frac{5x^2 - 125}{9x^2 - (2x+3)^2}.\)
x/ \(\frac{2-2x}{6x^3y} + \frac{3+2y}{6x^3y} + \frac{2x-5}{6x^3y};\)
z/ \(\frac{1}{3x-2} - \frac{4}{3x+2} + \frac{3x-6}{4-9x^2}.\)
n/ \(\frac{6-x}{x^2+3x} + \frac{3}{2x+6}\)
p/ \(\frac{3}{2y+4} + \frac{1}{3y+6}\)
o/ \(\frac{1}{xy-x^2} \frac{1}{y^2-xy}\)
t/ \(\frac{x+1}{x+4} \frac{x^2-4}{x^2-16}\)
v/ \(\frac{-3x}{2x} + \frac{3x-2}{2x-4x^2}\)
w/ \(\frac{2x-2}{15} + \frac{3+2y}{6x^2y} + \frac{2x-5}{6x^3y}\)
y/ \(\frac{x^2}{x+y} + \frac{y^2}{x+y+z} - \frac{y^2}{x+y} - \frac{z^2}{y+z};\)
J/ \(A = \frac{20x^2 + 120x + 180}{(3x+5)^2 - 4x^2} + \frac{5x^2 - 125}{9x^2 - (2x+3)^2}.\)
x/ \(\frac{2-2x}{6x^3y} + \frac{3+2y}{6x^3y} + \frac{2x-5}{6x^3y};\)
z/ \(\frac{1}{3x-2} - \frac{4}{3x+2} + \frac{3x-6}{4-9x^2}.\)