$-\left[+5-\left[\left(7-5\right)\right]-8\right]$
$\left(3x+4y-2z\right)^2$
$16x^2-96+176$
$3x^2-4x^2-19\cdot3x^2-4x+60$
$cos\left(x+\pi\right)=-sinx$
$\int2v^3dv$
$\left(1-\cos\left(a\right)\right)\left(1+\cos\left(a\right)\right)=\frac{1}{\csc\left(a\right)^2}$
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