$\left(\frac{2}{5}x^4-\frac{1}{3}x^3y^2\right)^3$

$-18-\left(-26\right)$

$\left(\left(3x\right)\right)x\left(\left(5x\right)\right)$

$\frac{d}{dx}ln\left[\frac{\left(2x+7\right)\left(x+3\right)^5}{\left(1-2x\right)^6}\right]$

$165.40112013663091010149580999529\cdot176.7857142857142$

$9+y+y+3$

$\left(2+1\right)\:\left(-6+8\right)$