$2+5\cos\left(\frac{1}{2}x+\frac{\pi}{2}\right)$
$\frac{v}{-7}+1=-6$
$6a+2a-5a$
$\frac{1}{\sin\left(a\right)\cos\left(a\right)}-\frac{1}{\cot\left(a\right)}=\cot\left(a\right)$
$7+9y-3y$
$2x^5+3x^4+8x^3+11x^2-4$
$\left(\frac{a^6b^7}{ab^4}\right)^3$
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