\(M=12xz-5xy=x\left(12z-5y\right)\)
\(N=64^2-49=64^2-7^2=\left(64-7\right)\left(64+7\right)\)
\(P=25y^2-16z^2=\left(5y\right)^2-\left(4z\right)^2=\left(5y-4z\right)\left(5y+4z\right)\)
\(Q=4-25y^2=2^2-\left(5y\right)^2=\left(2-5y\right)\left(2+5y\right)\)
\(R=25x^2-10x+1=\left(5x-1\right)^2\)
\(O=16-8y+y^2=\left(4-y\right)^2\)
\(X=1-6x+9x^2=\left(1-3x\right)^2\)