$49^2\cdot343$
$\left(3.7\right)^0$
$\int\frac{x^2-7}{x^2+6x+9}dx$
$\left(3n+2u\right)^3$
$\tan\left(x\right)\cot\left(x\right)=\sin\left(x\right)$
$\int_0^{\infty}\left(\frac{x^3}{\sqrt[2]{x^2+1}}\right)dx$
$7x+2=4x+23$
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