$2sin\left(x\right)cos\left(x\right)-1-2sin^2\left(x\right)$
$\lim_{x\to\infty}\left(\frac{\frac{\pi}{2}-\arctan\left(x\right)}{e^{\frac{2}{x}}-1}\right)$
$\int\:-e^{-x}\:dx$
$\left(3n+4\right)^3$
$16^{-6}\cdot16^8$
$a^2+3a-4$
$5^3\cdot10^3$
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