$2x^2+7x-15\:-2\left(x-\frac{3}{2}\right)\left(x+5\right)$

$\frac{\frac{\sin\left(x\right)}{\cos\left(x\right)}}{\sec\left(x\right)+1}$

$6\left(6h\right)$

$\left(7a^4+b^2\right)^2$

$\frac{d}{dx}\:x^3-3x^2y^4+y^3=6x+1$

$12x-3\:>6x\:-2$

$\frac{\sin\left(x\right)}{\cos\left(-x\right)}+\frac{sin\left(-x\right)}{cos\left(x\right)}$