$\left(10a^3-8b\right)^2$
$\cos\left(4x\right)=1-8\sin\left(x\right)^2+8\sin\left(x\right)^4$
$\frac{2}{2x+1}\:-\:\frac{3}{2x+1}$
$5+2n+9n$
$\int8x^3\sqrt{7x^4-\frac{2}{5}}dx$
$\cos^2x+3\sin^2x$
$\frac{x}{2}=-6$
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