Решите (6+b)×(6+b)(t+m)²(t-3)²(2t+1)²

(6+b)×(6+b)=(6+b)²=36+12b+b². ========================================================== (t+m)²=t²+2tm+m²=t²+2mt+m². ========================================================== (t-3)²=t²-2t*3+3²=t²-6t+9. ========================================================== (2t+1)²=(2t)²+2*3t*1+1²=4t²+4t+1. ==========================================================