$10+-20+80$
$10\:x\:+\:13\left(x\:-\:28.500\right)\:=\:860.000$
$\left(3+5i\right)-\left(7+2i\right)$
$\left(e^{2x}+e^{4x}\right)^2$
$\left(2a^3-4a\right)^2$
$2sin^2x-1=cos2x$
$\frac{2x^3+x^2+3}{x-3}$
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