21 7*x
3 - ------ + ---
-2 + x 2
$$\frac{7 x}{2} + 3 - \frac{21}{x - 2}$$
3.0 + 3.5*x - 21.0/(-2.0 + x)
Рациональный знаменатель
[src] 2
-82 + 7*(-2 + x) + 20*x
------------------------
-4 + 2*x
$$\frac{1}{2 x - 4} \left(20 x + 7 \left(x - 2\right)^{2} - 82\right)$$
2
-54 - 8*x + 7*x
----------------
2*(-2 + x)
$$\frac{7 x^{2} - 8 x - 54}{2 x - 4}$$
2
-54 - 8*x + 7*x
----------------
2*(-2 + x)
$$\frac{7 x^{2} - 8 x - 54}{2 x - 4}$$
21 7*x
3 - ------ + ---
-2 + x 2
$$\frac{7 x}{2} + 3 - \frac{21}{x - 2}$$