$3x^2+8x+3=0$

$\cos^4\left(x\right)\sin\left(x\right)-2\cos^2\left(x\right)\sin\left(x\right)+\sin\left(x\right)$

$\left(10a+4\right)-\left(6+9a\right)+8\left(3a-7\right)$

$-2\left(1+\frac{\left(-9\right)}{3}\right)$

$ag^2\left(-a^2g^3\right)^2$

$2x^2+13x-15=0$

$3-6\cdot\:2^3+2\cdot\:\left(-4\right)^2$