$\frac{\left(-4m^3\right)^2\left(5m^4\right)^3}{\left(-10m^6\right)^3}$

$-x+5<3$

$-\left(-3\right)+\left\{\left(-5\right)-\left[+8+\left(-10\right)\right]\right\}$

$-15:-30$

$\frac{d}{dx}\arctan\left(-\frac{x}{2}\right)$

$\sqrt{x^2+x^3}\cdot sin\left(\frac{\pi}{x}\right)$

$x\left(c-1\right)$