$\lim_{x\to\infty}\left(\frac{\sin\left(x+1\right)}{\sin\left(x\right)}\right)$

$2x-1<7$

$\left(3v^2-5w^4\right)^2$

$-\left[\left(-4\right)\cdot\frac{\left(-3\right)}{\left(-2\right)}\right]$

$\int xe^{-9x}dx$

$\int7x^3e^{-x^2}dx$

$\left(5m^3+3m^4\right)\left(5m^3-3n^4\right)$