(x-3)(4x+9)
16x^(2)+80x+16y^(2)-112y+247=0
1/4+1/8+1/16
1/4+1/5+1/15
1/3+1/9+1/18
1/4+1/10+1/16
defrentiate xyz(x) with respect to z
1/3+1/5+1/9
1/4+1/9+1/12
21 over 8 times 14 over 5 simplified
