$\sec\left(x\right)\cdot\left(1+\cot^2\left(x\right)\right)$
$\sqrt{9-3\cos^2}$
$4\cdot\left(-4\right)-3$
$\frac{7-3x}{2}<x+1$
$9\cos^2x-1=0$
$x^2+11x+64$
$\left(5x+2\right)\left(x+1\right)$
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