$b^2+3+2b^2+4-7$
$4x-5^4$
$x^2+3x+9^2$
$\int x\left(2x^2+1\right)dx$
$2sec^2\left(a\right)-1=\tan^2\left(a\right)+sec^2\left(a\right)$
$\frac{cot\left(x\right)-sin\left(x\right)}{cot\left(x\right)sin\left(x\right)}=csc\left(x\right)-tan\left(x\right)$
$8x^2+4x+2$
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