$6x^2,7x$

$sin\left(10x\right)cos\left(6x\right)=\frac{\left(cos\left(16x\right)-cos\left(4x\right)\right)}{2}$

$\int_{190}^x\left(\frac{1}{400}\right)\cdot\left(x-190\right)dx$

$csc\left(t\right)-sen\left(t\right)$

$\left(x+5\right)\left(x-5\right)\left(x^2+3\right)$

$12+\left(+9\right)-5-7-7-\left(-3+6+2\right)$

$\frac{2x^3y^3}{4y^2}$