$2^3.5^4.2^{-1}.5^2.5^3.2^{-2}.5^3.2^4$
$\int_0^12x\cdot e^xdx$
$6b-4a+4a-17b+b$
$\left(x+y\right)^2+\frac{\left(xy\right)\left(x\right)^2}{x}$
$a^2b^2c^2-c^2x^2y^2$
$-7x+7x-8$
$30-\:-10-2+1$
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