$\left(\frac{1}{5}a^2b-\frac{1}{3}c^3\right)^3$
$x^2+20y=10$
$7x^2-28x-5$
$342.65\cdot58.25$
$\tan\left(45+x\right)=-1$
$\left(\frac{4}{7}y-\frac{2}{7}\right)\left(\frac{4}{7}y+\frac{2}{7}\right)$
$z^2-6^2+8$
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