$\frac{3x}{4}+2;\:x=7$
$\left(3x\right)\left(x+5\right)$
$\frac{-4}{8}+\frac{1}{2}$
$\int\sqrt[3]{z}dz$
$7x^3-7x$
$f^2+4f+16$
$\left(5a^{4}-7\right)\left(5a^{4}+9\right)$
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