$\lim_{b\to\infty}\left(-b^3\ln\left(b\right)\right)$

$\frac{4}{x^2-25}\:\:\:\:\frac{x+\:2}{x^2-2x-15}$

$9a^2x^2-18ax^2$

$-10\le-1-w$

$9^2+\left(3+2\right)+\left(5+9\right)+3^2$

$\frac{1}{3}+x<\frac{5}{3}+2x$

$\frac{\cos\left(-a\right)}{\sec\left(-a\right)+\tan\left(-a\right)}=1+\sin\left(a\right)$