$\left(-5m+3n\right)\left(-5m-3n\right)$
$6,5\cdot7,89\cdot2,2$
$\log_{10}\left(\left(5x^2-x\right)\right)=2$
$\frac{3x}{\sqrt{2}}$
$\tan\left(35^{\circ}\right)=\frac{x}{6}$
$\left(-1\right)^6+2^4-3^2-4^0$
$-2\cdot23$
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