$\frac{sin3x\:+\:2sin2x\:+\:sinx}{4sin^2\left(x\right)cos\left(x\right)}$
$\left(-2a^5\right)^{-2}$
$\frac{\left(2x^2\right)}{\left(1-x\right)}$
$\frac{2x-1}{2}>0$
$\left(x^2+2\right)\left(y^2+8\right)$
$a^2+14a+33=0$
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