u-v 6u-3v
------ + ----------
8v 8v
7u-4v
------
8v
v≠0
6 5x
----- - ------
x-1 4
-5x2+5x+24
---------------
4x-4
x≠1
12 6
---- / ----
5 25
10
3 7
----- * -----
14 15
1/10
1 1 1
--- + --- = ----
12 x 4
x=6
(x)(12)(4)≠0
r+6 r+1
----- + -------
3r-6 3r-6
2r+7
-----
3r-6
r≠2
x+2 x-3
------------- - -------------
2x2+13+20 2x2+13+20
x(2x+5) 4(2x+5)
x≠4 x≠2.5
x+2 x2-4
------ / --------
7x 14
2
---------
x2-2x
x≠0 x≠-2 x≠2
8x3y 7x4y3
-------- * ---------
2xy2 4y
56x7y4
----------
8xy3
x≠0 y≠0
1 2 2
--- - ---- = ---
x x-1 x
x=1/3
x≠0 x≠1
5 5a+1
--------- + ----------
a2+3a+2 a2+3a+2
5a+6
-----------
a2+3a+2
7 8
--- - --------
3 12x-8
21x-20
--------
9x-6
x≠2/3
7x x2-6x
--------- / -----------
2x-10 x2-11x+30
14x+28
---------
7x3-28x
x≠5 x≠6 x≠0
4-x2 3x2+15x
------------- * ---------------
x2-x-6 6x2-12x
x+5
- -------
2x-6
x≠-2 x≠3 x≠0 x≠2
` 3x2 3x-4
----------- + ----------- = 2
2x-1 2x-1
x=-3 x=2/3
x≠1/2
3 4
---------- + ---------
x+7 x-8
7x+4
----------
x2-x-56
x≠-7 x≠8
x−4 x+4
----- - ------
x+2 x+1
9x+12
- -----------
x2+3x+2
x≠-2 x≠-1
9 - x2 x2 + 2x - 3
—------- / —---------
2x3 - 6x2 4x2 - 4x
2
- ---
x
x≠0 x≠3 x≠1 x≠-3
4-x2 (3x2+15x)
------------- * ------------------
x2-x-6 6x2-12x
x+5
- ------
2x-6
x≠-2 x≠3 x≠0 x≠2
2x 1 10
------ - ------- = ----------
x+5 5-x x2-25
x=-1/2
x≠-5 x≠5