1. Add or Subtract. (4x^2+15x-3)-(-3x^2+5)

Answer 1

well apparently to add first part of parenthesis will actually be 19*+2+3=24*,
and the subtracting part of the first part of the parenthesis will actually be 19*-2-3=14*, the other part will actually be 5*+5=10* or 3*+2+5=10*.(Now they may be the same but both of them are different look at the first numbers)and for subtracting on that is 5*-5=0* or 3*-2-5=0*(now they may look wrong but look at the equalization adding and the subtract)
add:24*
+10*=34*
subtract:14*-0*=14*
hope these answers are right and I actually worked them out