$$\lim_{x\to\infty}\left(\frac{sin\left(2x\right)}{sin\left(5x\right)}\right)$$

$$x^2+12=48$$

$$8m\:8m\:-\:12mn$$

$$-12q-9$$

$$f\left(x\right)=\sqrt{x^2}-5x+6$$

$$\int\left(x^2-2x+1\right)\cdot\ln\left(x\right)dx$$