add math

add math i didn't tuition rili cant pass..??when do exersice rili feel it is easy..bt y at exam the ques so hard..this time if i i didn't 粗心i rili can pass..if mum knw thiz time exam fail sure find ttn to me..bt i dun wan..i dun wan use money to ttn again..i rili cant handle it without ttn..??