$\frac{\cos\left(x\right)-\sin\left(x\right)^2}{\cos\left(x\right)}$
$1000+1.298$
$\left(x^5-2y^2\right)^4$
$\sin\left(\frac{x}{4}\right)=\frac{1}{2}$
$-4.2+\left(-8\right)$
$9x^2-42xy+49y^2$
$\int\left(xe^{\frac{-3x}{2}}\right)dx$
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