$$\lim_{x\to\frac{2\pi}{3}}\left(-2\cos\left(2x\right)\right)$$

$$\left(1+x\right)^2<=1+2x$$

$$m^2-10m^2+25$$

$$\lim_{x\to0}\left(\left(\frac{\ln\left(1+x^2\right)}{\cos\left(x\right)-e^x}\right)^{cot\left(x\right)}\right)$$

$$\left(2c+3\right)^3$$

$$-\frac{3}{5}a^3b\left(\frac{1}{6}a^2b+\frac{10}{3}a^3b^2-\frac{5}{3}a^2b^2\right)$$