$8+9+7+10+7+9$
$1.089\::\:\:9$
$3+cos\left(x\right)=1-7cos\left(x\right)$
$x\left(a^2-b^2\right)+7y\left(a^2-b^2\right)-\left(a^2-b^2\right)$
$\frac{tan\left(a\right)}{1-cot\left(a\right)}+\frac{cot\left(a\right)}{1-tan\left(a\right)}$
$\left(3s^5+8t^{12}\right)\left(3s^5-8t^{12}\right)$
$\left(2a^2b+4b^3\right)^2$
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