$-4\cdot7-7$
$3y+y+20=180$
$dr-rdx=0$
$\frac{\cos\left(x\right)+\sin\left(x\right)-\sin^3\left(x\right)}{sin\left(x\right)}=\cot\left(x\right)+\cos\left(x\right)$
$2p=a+b$
$-a+b-2b-2c+3a+2c-3b$
$\left|\left(\frac{49ab^{-2}}{4a^{-3}b^2}\right)^{\frac{1}{2}}\right|^6$
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