a)\(\left(6x+1\right)^2+\left(6x+1\right)^2-2\left(1-6x\right)\left(6x-1\right)\)
\(\Leftrightarrow36x^2+1+36x^2+1-2\left(36x^2-1\right)\)
\(\Leftrightarrow1+1+2=4\)
b) \(\Leftrightarrow4x^2-9-\left(x^2+10x+25\right)-\left(x^2+x-2\right)\)
\(\Leftrightarrow2x^2-11x-32\)