$$-3p+2\left(-5-8p\right)$$

$$6x+2y.4x+3y$$

$$\lim_{x\to-\infty}\left(\frac{x^4-45}{x-8}\right)$$

$$a^2+2ab-b^2;\:b=2;\:a=1$$

$$5.6\sqrt[4]{6}+0.08\sqrt[4]{6}+5.25\sqrt[4]{6}$$

$$27a^3-125$$

$$\frac{4x^2-5x-7}{2x^2+2}$$