$\log\left(w^2+21\right)=\log\left(10w\right)$
$3-x<6x+8$
$9^2+4$
$63+63+63+63$
$48-28x+3x^2$
$\frac{a}{s+2}+\frac{\left(bs+c\right)}{s^2+4s+5}$
$\frac{1-\sin^2\left(x\right)}{sin\left(x\right)}+sin\left(x\right)$
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