$\left(4x\:-\:7\right)^2$
$\left(x-1\right)\cdot\ln\left(x-1\right)$
$e=1e=\frac{1}{2}at\cdot2$
$\left(d^2-5\right)\left(d^2+3\right)$
$34x^{2}+2x-6$
$\frac{\tan\left(x\right)}{1-\cot\left(x\right)}-\frac{\cot\left(x\right)}{1-\tan\left(x\right)}$
$-5\cdot5x^2+3xy-7-x^2$
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