$\int_7^{4x^3}\left(4t-4\right)dt$
$\left(7x-7\right)\left(7x+7\right)$
$4cos^2x\:+8$
$2x^2+2xy-3zx-3zy$
$\frac{52}{-13}$
$\int x\cos\left(x^2+3\right)dx$
$\frac{1-\tan\left(x\right)}{\csc\left(x\right)-\sec\left(x\right)}=\sin\left(x\right)$
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