-1-(-5x)-2x+2 x 2 +7

-1-(-5x)-2x+2x2+7    

Simplify the following:
2 x^2--5 x-2 x-1+7

-(-5)  =  5:
2 x^2+5 x-2 x-1+7

Grouping like terms, 2 x^2+5 x-2 x-1+7 = 2 x^2+(5 x-2 x)+(-1+7):
2 x^2+(5 x-2 x)+(-1+7)

5 x-2 x = 3 x:
2 x^2+3 x+(-1+7)

7-1 = 6:
Answer: | 
| 2x^2+3x+6

2x²⁺3x+6