$\left(-78+8\right)-\left(-6+87\right)$
$\left(2y\:+\:5z\right)\:\left(2y\:-\:5z\right)$
$\int e^{\frac{x^4}{4}}x^3dx$
$25^2+30ab+9b^2$
$\left(4x^2y^0\right)^{-4}$
$\left(4b-49\right)-\:\left(4b^2+28b+49\right)$
$5+2-\left(-3+8\right)$
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