$4\left(-1\right)^5-4\left(-1\right)^4+10\left(-1\right)^2-\left(-1\right)-6$

$3x^2y-27y$

$\int_{\ln\left(\frac{\pi}{6}\right)}^{\ln\left(\frac{\pi}{2}\right)}\left(2\cdot e^x\cdot\cos\left(e^x\right)\right)dx$

$\frac{2m}{m}$

$5^{\left(4\right)}\cdot5^{\left(-7\right)}$

$3^3x\:3^5:\:3^2$

$r^2-6r+9=0$