Answer:
 -7y2 - 8y + 5
Explanation:
Changes made to your input should not affect the solution: 
 
 (1): "y2" was replaced by "y^2". 1 more similar replacement(s).Step 1 : 
Equation at the end of step 1 : 
 ((((0 - 23y2) - 2y) + y2) - 6y) + 5 
Step 2 : 
Step 3 : 
Pulling out like terms : 
 3.1 Pull out like factors : 
 
 -7y2 - 8y + 5 = -1 • (7y2 + 8y - 5) 
 
Trying to factor by splitting the middle term 
 3.2 Factoring 7y2 + 8y - 5 
 
The first term is, 7y2 its coefficient is 7 . 
The middle term is, +8y its coefficient is 8 . 
The last term, "the constant", is -5 
 
Step-1 : Multiply the coefficient of the first term by the constant 7 • -5 = -35 
 
Step-2 : Find two factors of -35 whose sum equals the coefficient of the middle term, which is 8 . 
 
 -35 + 1 = -34 
 -7 + 5 = -2 
 -5 + 7 = 2 
 -1 + 35 = 34 
 
Observation : No two such factors can be found !! 
Conclusion : Trinomial can not be factored 
 
Final result : 
 -7y2 - 8y + 5 Hope this helps