$\int_0^{\pi}\left(cos3xcos4x\right)dx$
$\sin^2\left(a\right)-\sin^2\left(b\right)$
$\left(4x^3-3x^2y^2\right)^2$
$2r^3\left(r^2s+rs^2+rs\right)$
$\int\left(3x^2+6x+4\right)^5\left(2x+2\right)dx$
$\:\frac{5x^4}{x}$
$\lim_{x\to\infty}\left(\sqrt{4x+\sqrt{4x+\sqrt{4x-2\sqrt{x}}}}\right)$
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