$-10+\left|2+\left(-8\right)\right|+6$

$16-104x^3+169x^6$

$\lim_{x\to\infty}\left(\frac{\sin\left(9x\right)}{\sin\left(7x\right)}\right)$

$\int\frac{x}{\sqrt{x^2+1}}dx$

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

$x^3-x^2+x^{-2}-5^2$

$18x^5-25x^4+4x^3-15x^2-4x=0$