$\log_{10}\left(x\right)=\frac{\log_{10}\left(4\right)}{\log_{10}\left(2\right)}$

$\left(+an^{2}+1\right)\cos^{2}$

$-3a^{\left(-3x\right)}\cdot a^{\left(3x\right)}$

$\left(-2ab^2c^2\right)\left(-2a^3bc^4\right)\left(-2a^5bc\right)$

$\lim_{x\to0}\left(ln\left|x\right|-ln\left|x\right|\right)$

$x-y-2x-3y$

$\left(v-8\right)\left(v+10\right)$