$\log\left(x\right)=\log\left(x+1\right)-\log\left(2\right)$
$\frac{\sec\left(0\right)}{\sin\left(\frac{\pi}{4}+1\right)}$
$x+\frac{4}{x}=1$
$\frac{x+2y}{3}-\frac{2x-y}{2}$
$\left(7y^2+3\right)\left(7y^2-3\right)$
$28-2\left(7\right)$
$\frac{6x^4}{2x^3}$
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