$\frac{x^2-1}{2x^2-x-1}$
$2x+10>4$
$\int_1^x\left(\frac{1}{\left(7x^3\right)}\right)dx$
$\left(0.25\right)^{x-1}=\left(\frac{1}{8}\right)^{1-x}$
$\int\frac{x^2}{\left(64+x^2\right)^2}dx$
$\left(5z+2y\right)^2$
$a^2+4a+4^2$
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