$\frac{sin\left(2x\right)}{1+cos\left(2x\right)}\:tan^2x$
$\left(a+b\right)\left(a-b\right)+\left(a-b\right)^2+a\left(2b-a\right)$
$\left(sinx+cosx\right)\left(secx+cscx\right)$
$y'-2y=3e^{2x}$
$\lim_{x\to\infty}\left(\sqrt{x^2+17x}-x\right)$
$\sqrt{3\:x}\sqrt{3^5}$
$\int4x\:sen\:5x\:dx$
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