$\left(x-3\right)\left(x+4\right)<0$
$-\frac{1}{x}-\frac{3}{x}$
$n^2+4n-12$
$144 p ^ { 2 } - 900 q ^ { 2 }$
$ydx=\left(e^{2x}+1\right)dy$
$\left(\frac{4}{9}+\frac{x}{3}\right)^{2}$
$\cot\left(x\right)^3+\cot\left(x\right)^2+\cos\left(x\right)+1$
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