$-5\left(1+\left(-7\right)\right)$
$-2f+4f+9f-2f-9$
$-\left(x+4y-43\right)+\left(-8x+3y-6\right)$
$\int x^{-4}\:dx$
$4^2+4$
$12x^2+28x+15x+35$
$\int\left(tan\left(\frac{7x}{3}\right)\right)^6dx$
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