$\lim_{x\to\infty}\frac{4x^2-10x+6}{4x^2-10x+6}$

$\:\left[-9+\left(-2+4-7\right)-\left(2-3\right)\right]+\left(-9\right)$

$\left(6x^2+3y^3\right)\left(6x^2-3y^3\right)$

$14x^2-10x$

$57\:+-550$

$e^{xyz\left(x+1\right)}+\ln\left(5x+z\right)^{y+1}=0$

$2\sin\left(2x\right)=2$