solve y'-4y=12
(x+5)(x-5)(2x+1)
$(r+3)^{2}$
-(1/8.55E-4)ln[-ln(0.3046)]=
$(r+3)^{b}$
y'-4y=12
slove for y if y(4)=0
3n-1=2(n+1)
solve 20=4(2+w)
-1/8.55E-4ln[-ln(0.3046)]=
x(x-5)(x-3)
