$cot\left(45\right)=\frac{cos\:\left(45\right)}{sin\left(45\right)}$
$\frac{secx}{secx+1}-\frac{secx}{secx-1}$
$\left(0.3a-5.6b^2c\right)^3$
$4 ^ { y + 1 } \cdot 4 ^ { 1 - x }$
$\frac{dy}{dx}+\frac{5y}{e^3x}=0$
$\frac{3s^2}{\left(s+1\right)\left(s+1\right)}$
$\frac{sec\left(x\right)-cos\left(x\right)}{tan\left(x\right)+cot\left(x\right)}$
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