$\sin\left(x\right)=\frac{1}{2}\sec\left(x\right)\sin\left(2x\right)$
$2\left(-5\right)+9$
$25z^2+30z+16$
$\sqrt{a}^{11}$
$f\left(x\right)=\left(x-1\right)\left(x+1\right)^2$
$\int2x\left(7-x^{2}+x\right)dx$
$\left(-4\right)^2-2\left(-4\right)+1$
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