Keisha is working to complete her summer reading in one week this is so she can chill for the remainder of the summer she read (2x^2+5x-3) pages of unbroken on monday (5x-3) pages on tuesday and (6x^2+ 2) pages on wednesday how many pages did she read in three days

We suppose that's just an odd way of asking the sum of three polynomials.
  (2x^2 +5x -3) +(5x -3) +(6x^2 +2) = x^2*(2+6) +x*(5+5) +(-3-3+2)
  = 8x^2 +10x -4 . . . . . "pages in 3 days"