$85^2$
$\lim_{x\to0}\left(\frac{e^{3x}-1}{e^x}\right)$
$2\left(x+1\right)^2$
$\cos^5\left(x\right)=\cos\left(x\right)-2\sin\left(x\right)\cos\left(x\right)+\cos\left(x\right)\sin\left(x\right)^4$
$5\:x\:5\:x\:5\:x\:5\:x\:5$
$7\sin\left(2x\right)=4\sin\left(x\right)$
$\left(5a^3-1\right)^2$
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