$2sin^2x=sinx+3$
$\left(x+5\right)\left(x+3\right)-x^2-15$
$\left(x+y+1\right)^3-\left(x+y\right)^3$
$6x-25+43+x$
$\left(4a^2\right)\left(4-a^2\right)$
$\sin x=\frac{5}{7}$
$3-4\left(2^0-6^1+1^9\right)^2$
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