Giải phương trình
a) \(\left(6x+5\right)^2\left(3x+2\right)\left(x+1\right)=35\)
b) \(\left(4x+1\right)\left(12x-1\right)\left(3x+2\right)\left(x+1\right)-4=0\)
c) \(\left(x-1\right)\left(x-3\right)\left(x^2-4x+8\right)=6\)
d) \(\left(x-1\right)\left(x+2\right)\left(x+4\right)\left(x+7\right)=16\)