$-12-\left(-9\right)-\left(-7\right)$
$\frac{1}{2\left(sen\left(y\right)\right)^2}$
$\left(2a^x\right)\left(4a^{x+1}\right)$
$-100\cdot1$
$\frac{x^{2}-5x-36}{x^{2}+8x+16}$
$28-\left|\left(7-12\right)\cdot\left(15-12\right)\right|\cdot7$
$\frac{\left(3x+2\right)^2}{\left(2x-1\right)}$
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