$\left(14\right)\cdot\left(0.5\right)$

$25p^2+\frac{50}{7}pq+\frac{25}{49}q^2$

$3^4-4^2$

$\left(8a^{2n}-3b^{m-1}\right)^2$

$-3y+2-y+4-3y$

$9y^2-12y=0$

$\log\left(x\right)-\frac{1}{2}\log\left(x+1\right)-\log\:\left(x-1\right)=\log\:\left(\frac{x\sqrt{x+1}}{x^2-1}\right)$