$9x-4<0$

$\int\:\left(x^4-5x\right)^9\left(4x^3-5\right)dx$

$\:f\left(x\right)=\:\left(1+\frac{1}{x}\right)^{\left(8+1\right)\cdot\:\:x}\left(cosh\left(7x\right)\right)$

$\frac{x+4}{x+3}\le1$

$121-198a^6+81a^{12}$

$-\left(-2\right)+1$

$\lim_{x\to\infty}\left(-\frac{3cscx}{cotx+1}\right)$