$-86x+43>0$
$\lim_{x\to-9}\left(\frac{-8x^2-71x+9}{x+9}\right)$
$9x-4<5x+16$
$\frac{tan^2\left(x\right)}{csc^2\left(x\right)}$
$\int5x\sin\left(1-5x\right)dx$
$\left(cscx-1\right)\left(cscx+1\right)=csc^2x-1$
$6x-8\left(9x-8\right)$
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