$-\left(49z^2-14z+80\right)$
$-7+3\cdot5-\left(8-7\right)$
$a^2-b^2-5a-5b$
$\left(21+1\right)^2\left(32-21\right)$
$\left(5.4+3.25\right)\cdot8+3$
$\int\left(\left(5x^2+8x+3\right)^3\right)\left(20x+16\right)dx$
$45m^2n^3+15mn-30m^3n^2+60m^4n^4$
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