$\lim_{x\to\infty}\left(-\frac{83}{97}\right)^x$

$\lim_{x\to\infty}\left(\frac{e^x}{2x+\ln\left(5x\right)}\right)$

$-\left(7-8\right)^4\:\left(6\:\right)-\:\frac{\left(-39\right)}{3}$

$\left(v+1\right)^2$

$25x^2-20x$

$\frac{3x^2}{x^3\cdot3x^3}$

$\csc^2\left(1-\cos^2\right)$