$-2+\frac{9}{3}$
$4x+7\le35$
$\left(x^2-y^2+1\right)^2$
$\int8^{-5}dx$
$\int x\cdot\cos\left(2x\right)e^x$
$\sin\left(a\right)+\cos\left(a\right)\cos\left(a\right)=\csc\left(a\right)$
$3^0+3^{-1}-3^{-2}+3^2$
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