$\frac{1+\tan\left(y\right)}{1+\cos\left(y\right)}=\tan\left(y\right)$
$f\left(0\right)=7\left(0\right)-3+3\left(0\right)^2$
$\frac{3x+y^2}{x+y^2}-1$
$12+40-\left(16+22-20\right)$
$\sin\left(x+\pi\right)=0$
$2x+\frac{1}{3}\ge2$
$\left(x+9\right)\left(x^2+2x\right)$
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