$\left(4b+1\right)\left(4b+9\right)$

$5b^2\:+\:4\:=\:-12b$

$\frac{1}{1+4x+4x^2}$

$f\left(x\right)=-6x^2+x^3+10\:\:\left(x-4\right)$

$3m^2\cdot\left(5m-7n\right)-3n\cdot\left(2m^2+4n\right)$

$\left(m^2-7\right)\:\left(m^2+7\right)$

$\int_{0.16}^{0.33}\left(\frac{1}{ln\left(\frac{y}{0.16}\right)}\right)dx$