$2\log\left(x\right)-\log\left(4\right)=2$

$2-2\left(7x-3\right)$

$15cm\:5\:cm\:\sqrt{200\:cm}$

$xy\left(2x+3z+5\right)$

$4\cdot\left(-9\right)\cdot\left(-3\right)\cdot\left(-1\right)$

$\left(\frac{2}{a}-3\right)^2-9+\frac{4}{a^2}$

$\int\left(\frac{45x^4-8}{9x^5-8x}\right)dx$