$9x-7+3+z$

$\frac{9m-4}{8}+\frac{3m+8}{8}$

$\frac{\sin\left(x\right)}{x}-\cos\left(x\right)$

$\lim_{x\to\infty}\left(\frac{x}{\sqrt{4+x^2}}\right)$

$\frac{-x^4-4x^3+6x^2-7}{x^2-2}$

$\int\left(\frac{3x}{\left(4x^2-1\right)^5}\right)dx$

$\frac{1+\tan\left(x\right)}{\sin\left(x\right)+\cos\left(x\right)}$