g= (4t+1)(4t-1)-(3t+2)²
4t*4t+4t*(-1)+1*4t+1*(-1)-(3²)t+2*3t*-2²
16t²-4t+4t-1-9t²-12t-4
7t²-12t-5
h=2(s+5)(s-5)+(4s+3)²
(2*s+2*5)(s-5)+(4²)s+2*4s*3+3²
(2s+10)(s-5)+16s²+24s+9
2s*s+2s*(-5)+10*s+10*(-5)+16s²+24s+9
2s²-10s+10s-50+16s²+24s+9
18s²+24s-41
i= (3t+4)²-(1-2t)(6+t)
(3²)t+2*3t*4+4²-1*6-1*t+2t*6+2t*t
9t²+24t+16-6-t+12t+2t²
11t²+35t+10
