$\left(-2a+6a+3\right).7-5a$
$\csc\left(x\right)-\cos\left(-x\right)\cot\left(x\right)$
$\int\frac{\sqrt{4x^2-1}}{x^2}\:dx$
$\int\frac{csc\sqrt{x}\cdot cot\sqrt{x}}{\sqrt{x}}dx$
$4+16\cos\left(x\right)=10$
$3x^2-8x+2$
$\left(2x+8\right)\left(x+2\right)$
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