$\frac{\left(cos\:x-sin\:x\right)\left(cos\:x-\:sin\:x\right)-1}{sin\:x\:cos\:x}$
$\frac{5}{x}>1$
$\frac{x^2-9x+20}{x+2}$
$\frac{\frac{1}{x}}{x}$
$x^2-\frac{17x}{3}+\frac{289}{36}$
$-6+0\cdot\left(-5\right)$
$-9x+9x-5-2$
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