$sin2x\:=\:2sinx$
$\frac{12x^2-6x+3}{3}$
$\frac{\cos^2x-\sin^2x}{\sin x\:+\cos x}=\cos x\:-\:\sin x$
$\frac{-4x-7}{8}\ge2$
$41w+2w+47+24-8$
$\frac{\sin\left(x\right)}{2+\sec\left(x\right)}$
$\int\:\frac{x^5}{\left(x^2+4\right)^2}dx$
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