$2x+5y-14x+15y-6x-10y$
$\left(-6a-2b\right)\left(5a-2b\right)$
$\int\sin\left(x\right)\frac{1}{2}\cos\left(x\right)dx$
$\frac{169x^4y^5-81x^2y^4}{13x^2y^3-9xy^2}$
$-9.3-5.23$
$3x+1=1$
$x^{2\:}+3x\:+1$
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