1)4b+9+2b-3/6b=6b+6/6b=6 2)q+2-6-q/q-2=q-4/q-2=q-2/q-1 3)a+3/a-3+3/-(a-3)=a-3/a-3=1 4)m^2-n^2/m-n=m-n
2.x^2+1=5x+81x/(x-3^2)=1
3x^2+1/(x-3)(x+3)=1