Evaluate an expression that involves any operation Exercise

Evaluate $$\displaystyle{\dfrac{3\times a + b}{c}}$$ with $$\displaystyle{a=2.3}$$, $$\displaystyle{b=\dfrac25}$$, $$\displaystyle{c=\dfrac45}$$

Evaluate $$\displaystyle{\left(\dfrac{3}{5}\right) \times \left(m + \dfrac{n^2}{4}\right) }$$ with $$\displaystyle{m = 1.3}$$ and $$\displaystyle{n = 2}$$

Evaluate $$\displaystyle{\dfrac{\left(3 - \left(-4\right)x\right)^2}{y + 15}}$$ with $$\displaystyle{x = 2}$$ and $$\displaystyle{y=7}$$

Evaluate $$\displaystyle{\dfrac{-4 \times v}{c^2} + 2.6}$$ with $$\displaystyle{v = -2}$$ and $$\displaystyle{c = 4}$$

Evaluate $$\displaystyle{\dfrac{6 \times s - t}{t + w} }$$ with $$\displaystyle{s = -1}$$, $$\displaystyle{t = 2,}$$ and $$\displaystyle{w = .75}$$

Evaluate $$\displaystyle{\dfrac{\left(5 - a\right)^2\times 4}{b + \dfrac{2}{3}} }$$ with $$\displaystyle{a = 5.5}$$ and $$\displaystyle{b = \dfrac{1}{6}}$$

Evaluate $$\displaystyle{\dfrac{2 - a \times b}{\left(-3\right)^2 - c + 0.5}}$$ with $$\displaystyle{a = -2}$$, $$\displaystyle{b = 0.75}$$, and $$\displaystyle{c = 2.5}$$