$\int_0^{\infty}\left(\frac{1}{\sqrt{x^2+81}}-c\frac{1}{\left(x+8\right)}\right)dx$

$\int_1^2\left(csc\left(x\right)\left(sec\left(x\right)\right)^2\right)dx$

$\frac{d^2y}{dx^2}=-3$

$\frac{1}{x-1}>1$

$2a^2-7a+3$

$\left(x^{2m-5}-9\right)\left(x^{2m-5}+8\right)$

$-12\cdot132$